Quaternary economic activities include anything that has to do with research, teaching, and development. Other examples include computer and information work, consultancy, and scientific inquiry.  

Despite having the world’s second largest economy, China is not considered one of the “core” countries in the Core-Periphery Model. This is because standards of living and levels of product consumption are still quite low for a large majority of Chinese citizens. China’s economy is heavily driven by its manufacturing and exporting, which is a characteristic of a “semi-peripheral” country.

Tertiary economic activities are associated with the sale and exchange of manufactured products and raw materials. Examples of this include retail and marketing. In the past hundred years the majority of people living in the developed world have become associated with tertiary economic activities.

“World Cities” are so-named because they are global centers of economic activity. They are generally also centers of cultural diffusion and are extremely diverse, but this is not what makes them “World Cities.” Many are capital cities of major economic countries, but many are not, such as New York City and Los Angeles. the key to this question was narrowing the possibilities down to the most specific, and most significant, reason for the appellation.

Four of these answer choices make up the top 5 World Cities (the missing city is Paris) except for Berlin, which is considered a second-tier or third-tier World City, depending on which study you adhere to.

Quinary economic activities are sometimes considered to be a subset of quaternary economic activities, and sometimes considered their own separate category - it largely depends on which economist or geographer you ask. The primary difference between quinary and quaternary is that quinary involves high-level thinking and policy-making based on a large quantity of research and data. Something like ecotourism, that combines environmental conservatism with the industry of tourism, is an example of a quinary economic activity.

The generation of knowledge and the sharing of research are associated with quaternary economic activities. Examples of this include teaching, tourism, and customer service. As the economies of Europe and North America have transitioned away from primary and secondary economic activities the majority of the population has become employed in quaternary or tertiary economic activities.

The world’s biggest port in contemporary times is Shanghai. Shanghai is a port city in eastern China. In the last few decades China’s trade, particularly its exports, have grown dramatically. Rapid industrialization and immense government spending have contributed to this and China is now the biggest trading partner for the majority of countries in the world (overtaking the United States).

Tertiary economic activities include anything that has to do with the sale or exchange of goods. Retail, or the business of selling things, is one of the biggest areas of tertiary economic activity. Other examples include cab driving, real estate, and entertainment.

The evolution of western economies can be mapped to the growth from primary economic activities to quaternary and quinary economic activities. It is often assumed that this process can be transferred to the developing world, but there have been some notable exceptions that suggest that not all countries will experience the same manner of progression. Primary economic activities are concerned with the harvesting of raw materials - industries like agriculture and mining.