In which organisms is growth observed only up to a certain age?

To which external factors do living organisms show responses?

Which of the following statements are correct regarding the characteristics of living organisms?
$(a)$ Reproduction is a synonymous feature of growth.
$(b)$ Metabolism is a defining feature of all living organisms.
$(c)$ Cellular organization is the defining feature of life forms.
$(d)$ Consciousness is not a defining feature of living organisms.

Mark the incorrect statement $w.r.t.$ metabolism.

What do organisms,ranging from prokaryotes to complex eukaryotes,exhibit in response to environmental cues?

According to our convention,when do we focus on the specific characteristics of a living organism?