For a topic sentence, or the beginning sentence that signifies the main idea of the paragraph, you could focus on the fact that there are a variety of things to do at the beach (perhaps the 3rd sentence). To create a hook, or an eye-catching sentence, you can use the childhood memory of learning to swim, but perhaps in more detail. In other words, recreate the scene rather than just saying it was a happy memory (i.e. I'm five years old and am amazed by how weightless I feel in the water). Once you create the hook and topic sentence, you can talk about other activities at the beach as your supporting evidence.
Answer:
<em>He</em><em> </em><em>is</em><em> </em><em>g</em><em>oing</em><em> to</em><em> </em><em>sch</em><em>ool</em><em> </em><em>hop</em><em>e</em><em> </em><em>it</em><em> </em><em>h</em><em>elps</em>
The first option of "friction and air resistance being the reason for him to slow down
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