They have two pairs of main nerve cords organized around a number of paired ganglia. while they don't have a "true brain"-- they have somewhat of a nervous system, composed of the two, or three pairs of nerve cords contained in the visceral mass.
They can adapt and develop immunity to pesticides making it more difficult for humans to force them to leave our properties. You can also discuss the<span> evolution of antibiotic resistance in bacteria, which has a significant harmful effect on humans. It's mostly just developing methods of resistance to human impacts.</span>
More abilities and can adapt to it's area.
The answer is C, having many specialized parts.
Hydrogen and oxygen which makes up h2o / water
