Viruses are not considered living because they are not made of cells
lack cell nuclei
do not contain DNA or RNA
cannot reproduce

all of those answer are tru but do not contain dna or rna  would be most accurate.

Explanation:

Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.

the answer is 100% density i've answered this question before and done the quiz myself.