The living organisms can be unexceptionable distinguished from the non­living things on the basis of their ability for

The correct option is "responsiveness to touch".

Living organisms possess distinct characteristics that differentiate them from non-living things. Let us analyze why responsiveness to touch (irritability or sensitivity) serves as an unexceptionable defining feature:
1. Limitations of other options:
- Reproduction: While reproduction is a characteristic of living beings, there are many living organisms that cannot reproduce, such as sterile worker bees, mules, and infertile human couples. Hence, reproduction is not an all-inclusive defining property of life.
- Growth and movement: Non-living things, like mountains, crystals, or sand dunes, can also exhibit growth by the accumulation of material on their outer surface. Similarly, passive movement can be seen in non-living objects (e.g., wind blowing dust or water flowing).
- Interaction with the environment and progressive evolution: While these are biological phenomena, they are broad evolutionary and ecological concepts rather than immediate, direct physiological traits that can be instantly used to distinguish an individual living entity from a non-living one in a definitive, everyday sense.
2. Responsiveness to touch:
All living organisms, from simple prokaryotes to complex multicellular eukaryotes, have the ability to sense their surroundings and respond to external environmental stimuli (physical, chemical, or biological factors). This ability to respond to touch or external stimuli is a fundamental and universal property of all living systems with no exceptions, making it an unexceptionable basis for distinguishing living organisms from non-living matter.