完形填空。
阅读下面短文，掌握其大意，然后从各题所给的四个选项（A B C D）中，选出最佳选项。
Bringing a giraffe into the world is a tall order．A baby giraffe falls 10 feet from its mother’s womb （子宫） and usually lands on its 1 ．Within seconds it rolls over and tucks（缩拢） its legs under its body．Gary Richmond describes how a newborn giraffe learns it first 2 in his book, A View from the Zoo．
