Question

Classification is
(a) grouping things as living and non-living.
(b) grouping living things on the basis of common properties.
(c) grouping non-living things on the basis of common properties.
(d) grouping all things, living or non-living, on the basis of common properties.

Answer 1

(d) grouping all things, living or non-living, on the basis of common properties.

Classification can be done in various ways, such as, living and non-living, man-made, or natural, etc.