In order to solve this problem, you need to understand the concept of the zero vector.

A zero vector is a vector where all elements are zero.

He received the letter challenging him to a duel and began preparing for the duel.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

It is important to understand the importance of health.

After having sex with him, her feelings towards him changed.

I have no intention of having sex with him.

Cross-site scripting is a serious security issue for websites.

He solved complex mathematical problems using his new calculator.