Which of the following best describes an electron

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

Organisms that successfully adapt will leave to grownone of the above

Which would be the most useful source of evidence to support mcneill's contention?