In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with
carbon, so the molecule is formed by two double bonds.
Two double bonds means that the total number of electrons being shared in the molecule is
two.
four.
six.
eight.

Four

Explanation:

Carbon dioxide (CO2) has carbon as its central atom with Four valence electrons while the oxygen atoms need two electrons each to form a stable octet structure.

Thus, two double bonds are formed with carbon in the centre covalently linked to the two oxygen atoms by its four valence electrons

four

Explanation:

Because there are two oxygen atoms and there is a double  bond

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.