Dr. Green and Dr. Xiao work in our biotechnology R&D department. As a , Dr. Green studies the life functions of plants and animals. Dr. Xiao examines the chemical makeup of living things in her role as a .

Dr. Xiao examines the chemical makeup of living things in her role as a biochemist.

Explanation:

Biochemistry is a science that studies the molecules, chemical reactions, and processes that take place in a living organism, such as plants, animals, human beings, cells, bacterias, amongst others. It is a branch of science that combines elements of Biology, Chemistry, and Physiology to pursue its objective.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.