PLEASE HELP Henry is digging in a shale formation in Kentucky and finds a brachiopod. He continues digging deeper and finds a trilobite. Which of the following statements correctly relate the brachiopod and the trilobite?
a- The brachiopod is smaller than the trilobite
b- The trilobite is smaller than the brachiopod.
c- The brachiopod is older than the trilobite,
d-The trilobite is older than the brachiopod.

i think the answer is

mass

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.