B. What is the dependent variable? 50
# of deer
38
32
lo
Month
Sept
Oct
Nov
Dec
Jan
Feb
26
20
15
12

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