Where do most producers get their energy from?
a. from the water
b. from the sun
c. from other organisms
d. from the air

b. from the sun

Explanation:

Most of the producers are the plants and other autotrophic organisms that obtain their energy from the light energy of sun. These organisms use the light energy from sun to convert this energy into chemical energy of food by the process of photosynthesis. In the absence of sunlight energy photosynthesis will not occur. The ingredients like water and carbon dioxide are used to produce oxygen and carbohydrates in the presence of sunlight.  

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

well the answer is 2!