What this basically means is that in order for all the animals to survive in a certain amount of area they have to have so much food, water and shelter to be able to live.
(this; basically means; ) (so much food, water and shelter; to be; able to live) (What this basically means; is; that) (all the animals; to survive; L:in a certain amount of area) (they; to have; so much food, water and shelter to be able to live)
this so much food, water and shelter What this basically means all the animals they
basically means to be is to survive to have
able to live
that
L:in a certain amount of area
so much food, water and shelter to be able to live