As a group, living things must be able to do all of the following except a. obtain and use energy. b. grow and develop. c. remain without change over time. d. respond to their environment.

The answer is c.
Answer a, obtain and use energy, is a characteristics of living things, called nutrition.
Answer b, grow and develop, is a characteristic called growth
Answer d, respond to environment, is where living things will react to stimuli,
Therefore the answer is c