I'm 13 and I'm 100 lbs, 5,4 am I fat?

Which level of consumer had access to the smallest apply of energy

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?