Mention the example of invertebrate animals and their tools

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

the answer

b.) bowling ball

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.