Because in winter 1 habitat might get too cold so the bird might have to move to a warmer habitat in winter
Answer:
All living organisms need energy to grow and reproduce, maintain their structures and respond to their environments. Metabolism is the set of life-sustaining chemical processes that enables organisms to transform the chemical energy stored in molecules into energy that can be used for cellular processes.
Explanation:
We are organisms.
C. hemoglobin hope this helps
