Because they feel like life doesn't matter anymore. maybe they have been through a lot amd can't deal with it anymore and they are to afraid to ask for help. a lot of people who get bullied feel as though they should give up.
Answer:
Oxygen
Explanation:
Your cells use oxygen for energy, as a result makes carbon dioxide
Answer:
Raise the bed to a comfortable height
Explanation:
The right side of your heart gets blood from your body which pumps it into your lungs
A leaf is an organ because the leaf is made of lots of tissues. It helps the plants.