Elephants and rhinos tolerate the small birds the ride their backs and eat insects on their skin. The relationship between the elephants and the birds is called ________.<span>commensalism.</span>
Pyramid biomass
<span>Pyramid biomass shows how energy are passed at
each tropics level and it is a graphical representation that shows the extents of
biomass per unit area at different tropic level with an ecological system. Also,
biomass is the food available for the next tropic level in a food chain and
they can be used as a source of renewable energy. </span>
