a
8. Why does the parasitic flatworm of the amber snail alter the behavior of the snail so that it
moves to the moves to the top of a plant stem?
The flatworm needs the snail to move off the ground to avoid predation
b. The flatworm needs the snail to be eaten by a bird to complete its life cycle
The conditions at the top of plant stems are better for the flatworm
d. There is more food for the snail at the top of plant stems than on the ground
