In winter, flocks of birds made up of different
species of birds can be observed foraging
together. Flocking together allows the birds
to find more food and be more alert to danger.
The birds all need to consume the same scarce
resources, though. What two behaviors do these
mixed flocks display?
A competition and commensalism
B mutualism and competition
C. parasitism and mutualism
D predation and commensalism