Answer:
Which term describes a group of cells that are similar and work together?
Tissues are group of similar cells and work together to perform a specific or particular function
Explanation:
Random changes in allele frequency in a population are usually called genetic drift. The reason why this is the answer is because it is a very specific word which is used to describe exactly that - random changes in allele frequency.
All the other cases; answers, here aren't correct and don't apply.
It is an example of a withdrawal reflex.