Which is an internal environmental factor that affects heredity
a) light
b) temperature
c) nutrition
d) hormones

its hormones.. but i also explain why!!

Heredity is defined as the process of passing down the biological character from parent to offspring through genes. The hormones are commonly known as the body’s chemical messengers that have effect on various processes in the body including the mood. Humans behave differently and studies found that both heredity and hormones affects human behavior though in different ways. Hormones are responsible for a number of human functions which include development, growth, metabolism, etc.

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.