What is missing from this summary? So, Opal found a dog, and the dog helped her to make friends.
The solution
The problem
The ending
The characters

The correct answer is B. The problem

Explanation

A summary is a short presentation about an event that includes the most important aspects of the event. The summary generally focuses on the exposition of the problem, the development, and the solution of a situation. According to the above, the presented sentence "So, Opal found a dog, and the dog helped her to make friends" is only presenting the problem and the solution without mentioning the problem, which was likely that Opal did not have any friends. According to the above, the correct answer is B. The problem.

3 is blunder, i’m not sure about the last one but the first two look correct

your answer is b. tense. hope this .