if I'm being honest I think it would be uhm C
Answer:
Solar Energy
The sun radiates solar energy to the earth and it is used for other things.
Out of the animals listed, calves are most genetically similar to humans.
I believe it is gel electrophoresis.
Gel electrophoresis is a techniwue used to separate DNA fragments or other macromolecules such as RNA and proteins based on their size and charge. It can also determine the actual size of a piece of DNA by examining it next to a standard "yardstick" made up of DNA fragments of known sizes.