I'm no expert at all so don't take my word but number one looks like it will make the most sense. Because it has the word reproductive system and yeah...
I believe you meant creatine instead of creating? The answer is that Creatine<span> is an organic acid that plays a key </span>role<span> in supplying energy for muscle cells during intense activity. </span>Creatine<span> is produced naturally by the </span>body<span> and found in small quantities in animal products. </span>Creatine<span> stored in muscle cells helps produce ATP, which is the primary energy currency in the </span>body<span>.</span>
I think the answer is
A. participating in an activity you enjoy
