Answer:
your body is attacked by its own immune system
Explanation:
your immune system overreacts and decides to attack your body mistaking healthy objects like skin to be something unhealthy like a virus.
Answer:
Lack of gravity causes you to use less work to move your muscles.
Explanation:
If on Earth your arm weighs 3 pounds, the muscle will only have to move 3 pounds of force. For example, if you were to go on the moon, your arm would have the same mass but there would be less gravity pulling it dow. So now your muscles only need to pull 1 pound. Over extended periods, you would be working less, thus not using your muscles to fullest potential and in result you would get weaker.
If an area as a relatively large number of leaves, these leaves can block much-needed sunlight for other organisms, whether they remain on the tree of fall to the ground.
The answer is Hydrogen Peroxide
Hydrogen peroxide is a product from organisms respiraton. It is harmful to the body and must be removed as soon as its produce in a cell , thats why the body make an enzyme to catalyze and remove it
