Please help for best I need good grade

i think its #2 or #4

Step-by-step explanation:

answer: a.   one is a factor of every whole number since every number is divisible by itself.

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !