Answer:B
Explanation:provitamin A is preformed vitamin A .. The best source of these are animal sources than plant sources.. Best sources include diary foods,, meat and fish.
Answer:
it is called tympanostomy tubes. they also help to equalize pressure
Reducing the Chemicals dumped into wastewater
Answer:
HIV (human immunodeficiency virus) is a virus that attacks a type of white blood cell called a T-helper cell (also called a CD4 cell). People who have been infected with HIV develop AIDS. People with AIDS often develop diseases caused by organisms that usually do not harm people who are not infected with HIV. Explain why the organisms are more harmful to people with HIV than to people without HIV
Answer:
https://en.m.wikipedia.org/wiki/Water_resources
can't upload the image though...
