Question

every opportunity observing the birds that lived around my familys home. ornithology drew me in like a moth to a flame. after completing high school, i was accepted at the cornell lab of ornithology where i became involved in species conservation. i spent several years color banding a wide variety of birds in california with the fish and wildlife service. the banding systems allowed us to study the birds annual survivorship, fidelity to territory and mate, and migratory status. years later, an acquaintance of mine from cornell offered me a position on a team that works for the conservation of peregrine falcons. ive been fascinated by these birds ever since. (3) the peregrine population crashed between 1950 and 1970 due to pesticides like ddt. the future of these magnificent birds remained uncertain for nearly two decades. thanks to the diligent work of conservationists like tom cade, officials removed the peregrine from the endangered species list in 1999. the result was that the peregrine population crashed between 1950 and 1970. what was the cause? mutation hunters disease pesticides

Explanation:

The text clearly states "The Peregrine population crashed between 1950 and 1970 due to pesticides like DDT."

Answer:

D. pesticides