Need some help! Thanks! :)

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

Which of the following terms describes all of the non-living components of an ecosystem

What part of the body contains bile, an enzyme that break down lipids?