Question

what characteristic in living things maintains a stable internal environment?
a reproduction
b photosynthesis
c metabolism
d homeostasis

Explanation:

Homeostasis is the ability of living organisms to maintain a stable internal environment despite changes in the external environment. Reproduction is about producing offspring, photosynthesis is the process plants use to convert light - energy into chemical - energy, and metabolism refers to all chemical reactions in an organism.

Answer:

D. homeostasis