Which type of electric charge repels other negative charges and attracts positive charges?

The type of electric charge that repels other negative charges and attracts positive charges is a negative electric charge. In the realm of electricity and magnetism, like charges repel each other while opposite charges attract. Therefore, negative charges will push away other negative charges due to the repulsion between them. Conversely, negative charges will pull towards positive charges, as the opposite nature of the positive charge creates an attractive force.

In fundamental terms, electric charge comes in two types: positive and negative. Positive charges, such as protons, attract negative charges (electrons) while repelling other positive charges. Neutral charges do not exhibit any significant attraction or repulsion towards either positive or negative charges due to the absence of an overall charge. The term "dual electric charge" does not refer to a recognized type of electric charge in this context.

Thus, the nature of negative electric charge leads to its ability to repel other negative charges while attracting positive charges, which correctly identifies it as the answer to the question.