Where is the list that you want us to choose from?
A substance that produces hydronium ions when it dissolves in water is said to be a acid.
It's a biologist (a person that studies living organisms and systems)
If an organism has a mutation, that helps it survive, it will breed and this mutation will keep in the gene pool. Out of all listed choices, the only mutation that will help an organism survive is c). The better a rabbit can hide from predators, the longer it will survive and the more will breed
