Question

which diagram shows a correct interaction between the fields of two charged particles?

Explanation:

Electric field lines start at positive charges and end at negative charges. For two like positive charges, field lines repel each other and point outward. For two like negative charges, field lines point inward and repel. For opposite charges, field lines connect the positive to the negative charge. The first diagram correctly shows repelling outward-pointing field lines for two positive charges, which follows the rules of electric field interactions.

Answer:

The top (first) diagram with two red positive charges and outward-curving repelling field lines.