prevent...from protect...from

问题描述:

prevent...from protect...from
Dinosaurs had few natural enemies besides each other,so each species had to _____ their young from being eaten by other dinosaurs.
Sadly it became hot and dry and the dinosaurs were unable to _________themselves from disappearing altogether.
选填prevent protect
我觉得第一句两个都可以啊

prevent from一般是通过对宾语(这里是their young)自身采取措施,来防止其遭受某种损害.
后者则主要表示对加害方采取措施以防止宾语受到损害.
这就是两者的区别所在.