Ans. (A). They are tiny.
Angiosperms are seed-producing, flowering plants. The flowers are adaptive structures that help in reproduction. The flowers attract pollinators (animals, birds, or insects) that transfer the pollen grains from anther (male organ) to stigma (female organ).
Flowers, which get pollinated by animals or birds are bright in color, produce nectar and scent to attract pollinators. These flowers are generally larger in size. Pollination by animals is more efficient than wild pollination as many pollen get wasted during wind pollination.
Thus, the correct answer is option (A).