animals are in danger and there will be space for them if we do nothing for them.A. More a

问题补充：

animals are in danger and there will be space for them if we do nothing for them.

A. More and more; less and less

B. Less and less; more and more

C. Fewer and fewer; more and more

D. More and more; more and more

答案：

(答案→)A. More and more; less and less

B. Less and less; more and more

C. Fewer and fewer; more and more

D. More and more; more and more

解析：句意：越来越多的动物面临危险，如果我们不为他们做些事情将来他们生存的空间会越来越少。Animal为可数名词，而space意为“空间”，为不可数名词，所以用less来修饰；故选A。