The correct option is B People with similar interests like to spend time with one another.
A proverb is a short saying that states a general truth or advice. They're popular as they are told and retold through generations, incorporated in books and stories that grandparents narrate to children. Proverbs have a deeper meaning than the one you perceive at first. The given proverb is an analogy between the nature of birds and that of man. Like how birds of same species (birds of a feather) will be seen together, the same way people who have similar hobbies and ideologies will be seen in each others' company. Option B explains the proverb the same way, hence B is correct. Options A, C, and D are not the actual meanings of the proverb, they provide general knowledge, hence A, C, and D are incorrect.