There are fewer organisms at the highest trophic levels, because

Because there is less energy at higher trophic levels

Explanation:

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.