Viruses are not living because

they are made of cells
they cannot synthesize dna or rna
they cannot reproduce on their own
they do not contain a cell membrane

the answer would be..

b. sucking

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.