Question 4
Why does a wind-pollinated flower produce a very large quantity of pollen and carry a branched stigma?
The right answer is the one marked above.
The wind does not aim, so the plant raises its odds by releasing more and making the target larger. The feathery branched stigma is a net.
Wind-pollinated flowers are in fact small and plain. Their pollen is small and light, the opposite of heavy pollen falling straight down — that is what lets it travel at all. No stigma produces pollen; that is the anther's work.