Question

seasonal or periodic movement of animals in response to changes in climate or food availability, or to ensure reproduction by moving from one area to another, is known as...
hibernation
migration
circadian rhythm
estivation

Explanation:

Hibernation is long - term inactivity in winter. Circadian Rhythm is a daily biological cycle. Estivation is inactivity in summer. Migration is the seasonal/periodic movement of animals between areas for climate, food, or reproduction. So the correct option is Migration.

Answer:

B. Migration (assuming the second option is labeled B, with the option text "Migration")