Which of the following is not a natural resource a. time b. water c. land d. air

The answer is A.time 

Hope this helps

Land is a natural resource
Water is. Natural resource
Air is natural resource
But time as many beleive is a natural resource

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.