What must happen before the World Wildlife Fund and the Mexican National Commission of Protected Natural Areas can estimate the monarch population for the year?
A. Monarchs fly through the sky in an area where they are recorded on camera.
B. Scientists wait at the forests because they will only have an hour to count.
C. The weather gets colder and monarchs gather and stay in predictable areas.
D. Groups of monarchs are caught in nets and checked to see if they are healthy.
1 answer
C. The weather gets colder and monarchs gather and stay in predictable areas.