Physical exercise is also important for your memory, because it increases your heart (4) and sends more oxygen to your brain, and that makes your memory work better. A. degree B. leve

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Physical exercise is also important for your memory, because it increases your heart (4)______ and sends more oxygen to your brain, and that makes your memory work better.

degree

level

rate

grade

Giải thích

Đáp án C

Physical exercise is also important for your memory, because it increases your heart rate.

(Bài tập thể chất cũng rất quan trọng cho trí nhớ của bạn, bởi vì nó làm tăng nhịp tim.)
→ Heart rate: nhịp tim