Question

flock simulation
(number of individuals in flock on x - axis, mean tracking success of attackers on y - axis; legend: dense flock (black), normal flock (red), loose flock (blue))
which statement best explains how being part of a flock may help an individual bird survive?
a. birds flying in dense flocks are harder to track.
b. birds flying in loose flocks are more confusing for predators.
c. birds flying at higher speeds get more protection from predators.
d. birds flying in small flocks have a better chance to escape predators.

Explanation:

The graph shows "Mean Tracking Success" for different flock densities. The dense flock has the highest tracking success (harder to track), meaning individual birds in dense flocks are less likely to be caught. Option A aligns with this. B is wrong (loose flock has lowest success). C and D lack graph support (speed/small flock data not shown).

Answer:

A. Birds flying in dense flocks are harder to track.