How living organisms grow?
It usually depends on the organism: some by adding more cells, some because the pituitary gland releases growth hormone.
Living Organisms are Conscious, non-living are not. Living can reproduce, non living cannot. Living can metabolize organic materials and grow, non-living cannot. Living organisms can move on themselves, non-living cannot. Living react to external environment (both biotic and abiotic), non-living cannot. There can be so many. These are the top 5.
Life has to be able to metabolize, grow, and reproduce. Viruses need outside cells to reproduce (then can't reproduce on their own), and therefore are not alive. However, viruses are considered organisms. So, viruses are one example of a non-living organism, but there are likely more. Bottom line: No, not all organisms are living things