I guess have sex, or "reporduce" xD
To get rid of liquid waste I believe
Answer: Ciguatera
Explanation:
Ciguatera is a food poisoning or foodborne illness. It is caused when the fish contaminated with the ciguatera toxin is ingested in the meal. It is a lipid-soluble heat-stable toxin. It is produced by the dinoflagellates. The ciguatera toxicity can cause symptoms like pain, malaise, labored breathing, blurred vision, numbness of body parts, cardiac as well as neurological problems in human beings. Based on the above description, the people of San Francisco are expected to be affected by Ciguatera.
Internal:
1. Budget - Where can you afford to go? What equipment can you afford?
2. Your Experiences – Have you had a bad accident or injury with physical activity before?
External:
1. Location and Weather– Is there a park in your neighborhood? Is it too cold or too foggy outside?
2. Family and Friends – Do you have a friend or family member that likes to be physically active?
Well the hormone would be one thing. I'd say because it strengthens our heart muscles and trains our breathing pattern to be more effective. These would lead to more efficient transportation of blood and hence oxygen to our whole body including our brain. Our brain becomes more alert, and our body more energetic.