What evolutionary explanations are there for death?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.

Bio molecules are essential to all living things. which biomolecule is “d” from the table