<span>Biological scientists are research scientists who examine how living organisms relate to the environment. They can specialize in any number of plant, animal or environmental studies. Biological scientists most often have earned a master's or doctoral degree in their specialization; such degrees offer the opportunity to develop research while finishing their education. Some low-level positions related to biological science are available to those holding baccalaureate degrees.</span>
B. Decayed matter - earthworm-duck
"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>
