Question

1. bird - watchers enjoy watching each year as the birds pass through on their routes. ornithologists, biologists who study the behavior of birds, can use these opportunities to study migratory behavior. people like to ______ the birds. a attract b include c confuse d observe

Explanation:

The context mentions bird - watchers enjoying watching birds, so "observe" which means to watch carefully fits the context. "Attract" means to draw in, "include" means to contain as part, and "confuse" means to make bewildered, none of which fit as well as "observe".

Answer:

D. observe