D. fossils will help you discover how old the rock is, fossils would not be included in the question if the answer does not relate to them
B weather.
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The population size that the environment can sustain. Hoped i helped:)
Answer: option B) Secretin
Explanation:
Secretin is an enzyme formed by the upper intestinal layer and gets transported by blood to the PANCREAS which it stimulates: causing the flow of pancreatic juice, also the flow of bile and intestinal juice but to a lesser extent.
Alongside Gastrin, Secretin is one of the hormones of the Gastrointestinal tract; but their functions differ
Therefore, Secretin is the answer