Answer:
D. organ systems
Explanation:
Organs and tissues that perform the same function are called organ systems
"Producers, consumers, and decomposers will be affected" is the one among the following choices given in the question that will be the <span>types of organisms that will be affected by a decreased supply of water in an ecosystem. The correct option among all the options that are given in the question is option "a". </span>
heart, arteries, and veins
