why do scientists say that living organisms demonstrate dynamic equilibrium?

a) activities take place inside living organisms all the time, but they maintain stability.

b) internal conditions in living organisms change frequently and are never the same.

c) living organisms respond to external changes with very different reactions each time.

d) environments don't change and therefore, internal conditions of living organisms don't change.

a) Activities take place inside living organisms all the time, but they maintain stability.

Explanation:

Living organisms demonstrate dynamic equilibrium as it is important for their survival by responding to the any external conditions. This response to the external stimuli and the internal condition of the organism is in dynamic equilibrium. If the organism will not respond to the external condition for survival then the nature will eliminate it.

i'm assuming that it's c.) red bank..