4 deletion
Explanation:
deletion is a type of genetic mutation involving the removal of a base pair
A phobia is an intense fear of something that, in reality, poses little or no actual danger. Common phobias and fears include closed-in places, heights, highway driving, flying insects, snakes, and needles. However, you can develop phobias of virtually anything.
OR
A Phobia is an irrational fear of something that's unlikely to cause harm. The word itself comes from the Greek word“phobos,” which means “fear” or “horror.” Hydrophobia, for example, literally translates to fear of water. When someone has a phobia, they experience intense fear of a certain object or situation.
The correct option is B.
The chromosome is a thread like structures, which is made up of nucleic acid and protein. It is usually found in the nucleus of living organisms and it normally carry genetic information in form of genes.
Answer:
By changing the direction of your applied force
