a, because exercise doesn't just aid the prevention of certain diseases, it helps prevent many diseases. i would've chosen d if it wasn't so specific but a is the correct answer.
D. This is a myth.
Advertisements are made for businesses and is
done if the product is not selling. It creates a need for the product resulting
in people buying it. Advertisements often include myths about the product to
promote it.
Answer:
not entirely certain but a possible answer could be "trephination"
Explanation:
people used to cut holes in people's heads to relieve them from mental illness. also called skull drilling.
The human body is mostly made up of water (H2O), and there is one oxygen atom in each molecule of water. Note that, although each water molecule also contains two hydrogen atoms, the atomic mass of hydrogen (about 1) is much smaller than the atomic mass of oxygen (about 16). Because of this, hydrogen contributes less to human body mass than oxygen.
