Question 2
Pollen from one flower is deposited on the stigma of a different flower on the same plant. What is this?
The right answer is the one marked above.
Cross-pollination. The definition covers pollen reaching a flower of the same plant or of another plant of the same species — so a second flower on the same plant still counts.
This is the case most often got wrong. Self-pollination is narrower: it needs the pollen to land on the stigma of that same flower. Artificial pollination would mean a person did it, and self-sterility is a flower refusing to set fruit from its own pollen.