What is the most important organism on the food web?

Provide a link to a resource if can.

Wind energy is plentiful in regions with vast open spaces it is a non polluting renewable resource what could be an economic factor that makes the use of this resource less feasible then non renewable resource even in such regions

Which could be a pathway of food through an ecosystem

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous