The girl has a problem.
She spilled/spills milk on the table.
Lily is lost in the park. She should find an adult who works there or a parent with children and ask for help. What is the reason for the solution? (contact her parents)
The reason is that/It is because they can help Lily contact her parents.
The boy has a problem.
He has a stomachache. / His stomach is hurt.
Anna has a problem. She lost her pencil. What is the solution to the problem? (ask friends for help)
She should ask her friends for help. / The solution to the problem is to ask her friends for help.
Jennie has a problem. She broke her brother's toy. What is the solution to the problem? (say sorry/apologize)
She should (has to, must) apologize to her brother. / The solution to the problem is to say sorry to her brother.
The floor in Peter's room is always dirty. He must take off his shoes before entering the house. What is the reason for the solution? (shoes get dirty after playing)
The reason is that/It is because Peter's shoes get dirty after he plays outside.