你好,同学
正确答案：填different
即：There are many different kinds of animals.
翻译：那有许多不同种类的动物.
解析：different kinds of 不同种类的,固定搭配
all kinds of 各种各样的
a kind of 一种
a kind 有点儿...,相当于a little
例如：
There are different kinds of flowers in the garden.
花园里有不同种类的花.
I have all kinds of postcards.
我有各种各样的明信片.
It's a new kind of aplle.
它是一种新苹果.
It's a kind difficult for me to answer.
它对我来说有点难回答.
希望能帮到你,祝更上一层楼O(∩_∩)O
有不明白的请继续追问,可以详谈嘛(*^__^*)