Answer: Im pretty sure it´s D.
Explanation: Manatees like to raise and feed their young in safe places so if we increase the amount of protected areas their population is more likely to increase.
Hope this helps!
Good environmental decisions need to have scientific facts thus in order to make informed decisions,policy makers are advised by letter C. Environmental scientists. In addition, not only scientific means is needed to have a good environment but also should include the economic,social and ethical aspects.
They would use a microscope to test it out.
Because the hydra has a nervous system characterized by a nerve net other than a cockroach