Answer:
C. visible
Explanation:
Well, you can't see ultraviolet light. Nor can you exactly see gamma or infrafred light. Visible light seems like the more reasonable answer.
Answer:
DNA
Explanation:
The nucleus is a central placed organelle in eukaryotic cells. It is said to contain the "blueprint of life" known as the DNA. The DNA is a structure located in the nucleus of the cell that encodes information necessary for the growth and development of the organism.
This information encoded by the deoxyribonucleic acid (DNA) of the cell includes how the organism will reproduce, hence, DNA is called the blueprint of life.
Definitely decompose dead organisms, otherwise there would be no oil for us.