Growth in living organisms is from

The correct answer is inside (Option 2).

To understand why growth in living organisms occurs from the inside, let us look at the fundamental differences in how living and non-living things increase in size:
1. Living Organisms (Intrinsic Growth): In living entities, growth is an internal, active biological process. It occurs due to cell division (mitosis) and cell enlargement. New protoplasmic and cytoplasmic materials are synthesized within the cells, causing the organism to grow from within.
2. Non-Living Things (Extrinsic Growth): Non-living objects, such as mountains, crystals, or snowballs, can also increase in size. However, their growth is due to the accumulation or deposition of similar materials on their outer surface from the outside. This is called extrinsic growth.
Therefore, true biological growth is characteristically internal (intrinsic), meaning it occurs from inside the organism.