Question

WHAT ARE THE MAJOR SPECIES PRESENT IN A AQUEOUS SOLUTION OF 1.0M CH3C00H?

I) CH3COOH
II) H20
III) H30+
IV) CH3COO-
VI) OH-

Answer 1

all of the above. Of course, one wonders what "Major" means. In a 1M solution, the major species will be water.
1M= is about 60 grams acid in almost 1000 grams solution, or about six percent, meaning 94 percent of the solution is water.

Answer 2

H2O