Which materials are common indoor air pollutants? check all that apply. a. smog b. natural gas c. vehicle exhaust d. mold in windowsills e. carbon monoxide will mark brainliest

Calvin is a 12-year-old boy. due to pressure from his friends, he has started consuming certain toxic materials that are addictive and harmful. calvin is a victim of what type of abuse? a. sexual b. substance c. physical d. emotional

Explain the signs and symptoms of alzheimer's disease with the following concepts: what causes this degenerative disease to occur in the brain? what would be the signs a patient should look for? explain.

He placenta begins absorbing nutrients and oxygen from the mother's body.