A. Kangaroos have got ... 1) a short tail, 2) strong back and front legs. 3) short front legs.

Из текста следует: "Kangaroos are interesting animals. Their back legs are strong, their tail is long and strong but their front legs are small..." Таким образом, у кенгуру короткие передние лапы и сильный хвост. Правильный ответ: 3) short front legs.