Please help please help please help please help please help

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.

Male-patterned baldness is more common in males as the name suggest. why is this? a. the gene for baldness is on chromosome 5 b. the gene for baldness is on chromosome 1 c. the gene for baldness is on he x chromosome d. the gene for baldness is on the y chromosome

Why does competiton happen? a: different organisms have different needsb: there are limited resources in an ecosystemc: there are no predators in an ecosystemd: organisms do not need the same resources (i think it's b but i'm not sure)