What are the advantages of early marriages? i want a simple and clear answer.

Advantages: A young mind is easier to adaptability and sustenance. As the mind grows old, it tends to become more habituated to firmness in the decision making process, thus leaving far less possibilities for the couples to compromise on situations. For women, an early marriage is safer in terms of pregnancy

Explanation:

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the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

you shopuld find your answers here if you need more. the answer is the infinite variety of human nature