Answer:
D. Adenine and Thymine form hydrogen bonds, while cytosine and guanine form covalent bonds.
Explanation:
I majored in Biology
Three of a predator's main weapons are sharp teeth, claws and jaws.
They are easy to be addicted to
they can hurt your mind
they are so addictive that you use them so frequently (hence the word abusing)
It is known as a innate behavior