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Câu hỏi:

20/07/2024 204

The author mentions kinglets in paragraph 1 as an example of birds that ________.


A. protect themselves by nesting in holes


B. usually feed and nest in pairs also

C. nest with other species of birds

D. nest together for warmth

Đáp án chính xác

Trả lời:

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Đáp án D

Giải thích: 

Tác giả đề cập đến chim tước trong đoạn 1 như một ví dụ về loài chim ________. 

A. tự bảo vệ mình bằng cách làm tổ trong lỗ           B. cũng thường kiếm ăn và làm tổ theo cặp

C. làm tổ với các loài chim khác                              D. làm tổ với nhau cho ấm áp

Thông tin: Body contact reduces the surface area exposed to the cold air, so the birds keep each other warm. Two kinglets huddling together were found to reduce their heat losses by a quarter, and three together saved a third of their heat. 

Tạm dịch: Tiếp xúc cơ thể làm giảm diện tích bề mặt tiếp xúc với không khí lạnh, vì vậy các con chim giữ ấm cho nhau. Hai con chim tước túm tụm cùng nhau được cho là giảm được một phần tư lượng nhiệt thất thoát và ba con cùng nhau có thể tiết kiệm được một phần ba lượng nhiệt của chúng.

Chọn D.

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     Birds that feed in flocks commonly retire together into roosts. The reasons for roosting communally are not always obvious, but there are some likely benefits. In winter especially, it is important for birds to keep warm at night and conserve precious food reserves. One way to do this is to find a sheltered roost. Solitary roosters shelter in dense vegetation or enter a cavity – horned larks dig holes in the ground and ptarmigan burrow into snow banks - but the effect of sheltering is magnified by several birds huddling together in the roosts, as wrens, swifts, brown creepers, bluebirds, and anis do. Body contact reduces the surface area exposed to the cold air, so the birds keep each other warm. Two kinglets huddling together were found to reduce their heat losses by a quarter, and three together saved a third of their heat. 

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