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
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nex

In carbon dioxide there are two oxygen atoms and one carbon atom each oxygen forms a double bond with carbon atom the molecules formed by two double bonds between carbon and oxygen atom.

Therefore, the number of electrons shared between these atoms are 8. Therefore, the correct answer to the above question is option d.

Explanation:

A covalent bond is defined as the bond which is formed between two atoms by sharing of electrons not by completely losing for gaining of electron. The covalent bond is is weak in nature when compared to ionic bond. Whereas it is stronger than Vander wall force.

The most common atom which makes covalent bond is carbon atom. The number of electrons present in the outermost shell of carbon atom is 4.  

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.