The fish don't need the direct energy from the sun but it does help to provide heat to the water which warms up and this is a very slow process also the fish eat herbivores that eat plants and the plant need the sun energy so photosynthesis can occur and as you move up in the food web or chain the fish will eventually eat something else that ate the plant.
Because evolution itself is a very slow process. Having said that, the chance of having a continuum of various animals would mean that evolution would have progressed very fast. Because evolution is slow, different species establish themselves for different ecological niches and environments, this enables them to become better through time at a certain environment which then leads to eventual diversification in the number of species.
Answer:
I think it's an example of equilibrium
The natural selection process applies majorly inside back species wether than between species.
Answer:
The farmer. The second option.
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