Concept:Discontinuous variation produces distinct, separate phenotypes with no intermediate forms.
Explanation:In plants, flower colour shows discontinuous variation.
A plant has one of a few clear colours, such as red, yellow, or white.
There are no intermediate shades between these categories.
Leaf size, plant height, and fruit size vary gradually over a range.
Therefore, these three characteristics show continuous variation.
Only flower colour falls into separate, non-overlapping classes.
Answer:A. Colour of flower