- Option (1) is incorrect because cellular organization is essential for metabolism in living organisms.
- Option (2) is incorrect because non-living organisms do not show reproduction; only living organisms can reproduce.
- Option (3) is correct because in Amoeba, growth and reproduction are closely related, as the organism divides and grows during the process of binary fission.
- Option (4) is incorrect because irritability is the ability of an organism to respond to stimuli, not the response of the environment.
Thus, the correct answer is "Reproduction is synonymous with the growth in Amoeba."