Carrying capacity is A
anything that limits how many organisms can live in an ecosystem.
B
how green plants make carbohydrates.
С
the process of respiration.
D
the number of organisms an ecosystem can support.

It's D the number of organisms an ecosystem can support.

Check if it's right first then if it is, happy to help

answer is a

explanation:

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.