....internal "body clock" or circadian rhythms.These involve physiological and behavioral changes in the body that occur during a 24 hour cycle.
Answer:

<em>Health education raises students' knowledge about physical, mental, emotional and social health. It motivates youth to improve and maintain their health, prevent diseases, and avoid unhealthy behaviors.</em>
The answers is B, there is good bacteria in your body that fight off bad bacteria such as the flu
Answer:
Chloroplast
Explanation:
This is because in the first stage of photosynthesis(light dependent stage) i water molecules is spilt by sunlight absorbed by chlorophyll- Photolysis into H+ and electrons, with Oxygen.
It is the H+ from above that is used to reduce CO2 in the light independent stage, as the Calvin Cycle, to produce Glucose, fatty acid, and protein.
Therefore in absence of water, absorption by the xylem due to inhibition by toxin, Photosynthesis is INHIBITED.Since no H+ is produced.
For one activity ir can be boxing. it can help with power, coordination, reaction time, and agility.
Srry but thats all I kniw. hope it helps