Which kind of plastid is more common in:
$(a)$ Roots of the plant
$(b)$ Leaves of the plant
$(c)$ Flowers and fruits

(A) Leucoplasts are colorless plastids primarily found in the roots of plants,where they store nutrients like starch,oils,and proteins.
$(b)$ Chloroplasts are green-colored plastids containing chlorophyll,which are abundant in the leaves of plants to facilitate photosynthesis.
$(c)$ Chromoplasts are colored plastids (containing pigments like carotene and xanthophyll) that provide red,orange,or yellow colors to flowers and fruits.