Odd question as there is multiple types of tissue that could be tested. Is there any additional information for the question?
Most likely though, it’s epithelial tissue.
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
Planting the same crop in the same place each year zaps nutrients from the earth and leaves soil weak and unable to support healthy plant growth. Because soil structure and quality is so poor, farmers are forced to use chemical fertilizers to encourage plant growth and fruit production.
Lions and tigers competing for an antelope.
