WILL GIVE BRAINLIESTTom, a 13 year old boy, wants to train for a 5k Fun Run that his school is organizing. What area of fitness should Tom focus on? What activities should he do to improve this area?

leg and core? he should bike and use a tredmile to practice

Explanation:

cardiovascular endurance

Explanation:

In order for Tom to successfully complete the marathon, he should focus on being able to maintain a constant pace without tiring easily.

answer; /// i believe that the correct answer is (c); ///when the lungs expand, they fill with air from the atmosphere;

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