Answer:
I have always enjoyed working with children.
Step-by-step explanation:
"I have always enjoyed working with children." is the most appropriate sentence for an application for a summer job as a camp counselor. A camp counselor's job is to interact with children, so showing an interest in children while also hinting that you have experience working with children is the best choice. The first sentence makes it sound as though the applicant is only doing the job for the money. The last sentence makes the applicant come across as ignorant to what the job will actually entail. The third option doesn't really give the prospective employer much information and could be a completely false statement.