Answer:
D (characteristics of living things)
Explanation:
All things in existence are made up of matter, which can either be living or non-living depending on whether or not they have LIFE in them. This means that the possession of life distinguishes a living thing from a non-living thing. This life that living things possesses makes them able to perform certain functions called their characteristics.
Based on these, the characteristics of living things have been summarized into an acronym called MR NIGER D with each letter meaning a particular characteristic.
M- Movement (ability to move)
R- Reproduction (ability to produce young ones)
N- Nutrition (ability to absorb nutrients)
I- Irritability (ability to respond to stimulus in the environment)
G- Growth (ability to increase in size, weight and height)
E- Excretion (ability to pass out waste products from the body)
R- Respiration (ability to obtain energy)
D- Death (ability to die)
Looking at all these characteristics, they are possessed by insects, plants, animals, humans etc. Hence, they are all grouped as living things.