Michael, a psychologist, is studying how biological and environmental factors contribute to a person's growth from birth to death. michael's topic of study fits best into the area of specialization known as psychology.

Michael's topic of study fits best into the area of specialization known as developmental psychology.

Explanation:

This type of psychology  follows a human throughout the course of their life. Scientists will cover how a human can and will change during and over their lifespan. They study how a person's social growth, intellectual growth, perceptual growth, and emotional growth can change in different periods of life.

Each person changes how they react and feel during each stage of their life. Many things can happen to make a human change how they act and behave in public and private. This is an important part of life and researchers use the information gathered to help others in the future.

the 2nd option is the answer

d.) continue to rise rapidly