South America compared to Africa

[Diamonds]

Is It necessary that there are only a little amount of Animal species so that plants can remain useful and profitable. If there are too many Animals all plants will dissapear. 

South America has produced many useful plants for Food and there are only few Animal species there. Plants were able to progress without disturbance. 

But Africa has got many powerful Animal species but only few useful plant species ? Its nature and soil is poor and lacking everything. Its plant species are not so useful and famous than those in South America.

 

[Diamonds]

How about the areas that has been totally protected from the animals. Are plant species of the Mountains more useful than in other places? 

How about the human beings. Have they protected plants as Being cut Off as a species upon earth?

Biodiversity kind of demands as little amount of animal species as possible. There are 5000 mammals, 10000 birds, 20000 fishes but huge amount of insects. 

How about Australia. Are there useful plants? Are there only few animal species?

At least those coral reefs have got TOO MANY animal species? Because they are so vulnerable and about to vanish. 

These comments are not very scientific. I just opened my eyes to see that South America plants are almost all I eat.