Humans evolved 3 billion years ago after the earth was formed.<span />
Answer:
it provides other readers with historical information
Explanation:
C. The object would be white. White is like the mother of colors, and besides, black wouldn't let you see anything. Blue and yellow are NOT relevant.
Not to be too picky, but the question ought to say a positively charge ion rather than atom.
I will assume that is what you mean. An ion, using ordinary means, will be positive if it loses electrons (which are negative).
An ion can never gain protons. Left alone, the nucleus will remain unchanged for the rest of eternity. D is wrong.
C is wrong. If electrons are gained, the ion will go negative.
B is wrong for the same reason D is. An ion can't gain protons and it can't lose them.
A is the answer.
