Which of the following is NOT mentioned as a reason that songbirds molt in the late summer?
A. fewer predators are in the woods.
B. the weathers is still warm.
C. the songbirds have finished breeding.
D. food is still available.
Giải bởi Vietjack
Chọn đáp án A
Điều nào KHÔNG được đề cập như là lý do cho việc loài chim biết hót thay lông vào cuối mùa hè?
A. Ngày càng ít thú ăn mồi ở trong rừng.
B. Thời tiết vẫn còn ấm áp.
C. Những con chim biết hót đã sinh sản xong.
D. Thức ăn vẫn còn.
Thông tin trong bài: "Many songbirds, for instance, molt in late summer, when the hard work of breeding is done but the weather is still warm and food still plentiful.This is why the woods in late summer often seem so quiet, when compared with the exuberant choruses of spring." (Chẳng hạn như, nhiều loài chim biết hót thay lông vào cuối mùa hè, khi việc sinh sản đã xong nhưng thời tiết vẫn ấm áp và thức ăn vẫn dồi dào. Đây là lý do tại sao các khu rừng vào cuối mùa hè thường có vẻ rất yen tĩnh, khi được so sánh với những điệp khúc rực rỡ của mùa xuân.)
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