The sport of swimming is done in a pool. The sport of running takes place on a track. While it is possible to run places other than a track, it is the most reasonable answer provided. Swimming and running are both exercise activities, while work would be related to an office.

A "whale" is a large animal found in the "ocean." So, to solve this analogy you need to determine where a "comet" is found. Well, a "comet" is a relatively small object found in space that orbits the sun. So, the correct answer is "space."

The edge of "land," where the "land" meets the ocean, is generally called the "coast." So, to solve this analogy you need to figure out which of these words means something like the place where one nation ends, the line that divides one nation from another nation. The correct answer is "border." To help you "nation" is basically another word for "country." 

"Pandas" are from "China," so to solve this analogy you need to figure out where it is that "kangaroos" are from. The correct answer is "Australia." Additionally, "leap" means to jump high or far.

A "kiss" is an action of "love." So, to solve this analogy you need to determine which of these is an action that might be undertaken by someone who "dislikes" someone else. The correct answer is "insult" which means say something mean or bad about/to. Additionally, "praise" means compliment, say something nice about; "respire" means breathe; "assist" means help.

Since an astronaut flies a space shuttle as part of his or her profession, we need to find a relationship where an individual uses a particular vehicle as part of his or her profession. Since only a firefighter would use a fire truck as part of his or her profession, the answer is "firefighter is to fire truck." 

Since a set is the location where an actor practices his or her profession, we must complete the analogy by finding the location in which a doctor practices his or her profession. As a doctor most likely practice his or her profession in a hospital, the correct answer is "hospital."

Since the relationship between artist and studio is that of a profession and the location in which the individual practices their profession, we must find the answer that shows the same relationship. Since a lawyer is a profession and the courtroom is where they practice that profession, the correct answer is "lawyer is to courtroom."

Since a bed is the object used for the primary function of a bedroom (sleeping), we need to find the object used for the primary function of a restroom. The primary function of a restroom is to relieve oneself, so the correct answer is "toilet."

The ceiling is the upper limit of a room and the floor is the lower limit of a room. Since the sky is the upper limit of our environment, our answer must be the lower limit. The ground is the lower limit of our environment, therefore "ground" is the correct answer.