OSS.03]The sentences below describe four Earth events. Auroras seen in the night sky at the poles.
Disruption of television and radio signals.
Change in the length of days and nights.
Improvement in the transmission of cell phone signals.
Which of these events is most likely to happen on Earth during a solar maximum?
1 and 2
1 and 3
2 and 3
3 and 4

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

b.have there own function.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.