A trainer is teaching a seal how to balance a ball on its nose. At the start, he gives the seal a fish for approaching the ball, then for nudging at the ball, and finally for holding the ball on its nose. The trainer is using:

hooking

Explanation:

the hooking thing is what fisherman's use. in an Aquarium, the people that train these types of animals use a fishing hook or any type of hard string/rope and a hook at the bottom in order to hold an object.

technology is the collection of techniques, skills, methods, and processes used in the the merriam-webster learner's dictionary offers a definition of the term: "the use of moreover, these technologies have become so complex that entire fields more recently, modern works of science fiction such as those by philip k.

explanation:

a 2,000 calorie based diet.