Answer:
C
Explanation:
Causes and increase in green house gasses such as CO2, N, and similar harmful gases.
Answer:
the vaccine causes the immune system to produce antibodies to the virus that causes the measles
The number of electrons in the outermost shell of an atom determines its reactivity.
Answer:
A solar eclipse can occur only when new moon occurs close to one of the points (known as nodes) where the Moon's orbit crosses the ecliptic. ... Therefore, the Moon's apparent size varies with its distance from the Earth, and it is this effect that leads to the difference between total and annular eclipses.