Question

2 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.

Explanation:

Monarch butterflies are migratory. When the weather gets colder, they gather in predictable over - wintering areas. This gathering makes it possible for organizations like the World Wildlife Fund and the Mexican National Commission of Protected Natural Areas to estimate their population. Options A (flying through an area and being recorded on camera) is not a reliable way for population estimation as it doesn't account for the entire population. Option B (scientists waiting at forests with only an hour to count) is too time - limited and not practical for a proper population estimate. Option D (catching monarchs in nets to check health) is about health assessment, not population estimation.

Answer:

C. The weather gets colder and monarchs gather and stay in predictable areas.