The correct option is D grape; cross pollination
Self-pollination is the transfer of pollen grains from an anther to the stigma of the same flower. Plants like rose, hibiscus, blackberry and sunflower pollinate in this way.
Cross-pollination is the transfer of pollen grains from the anther of a flower of a plant to the stigma of a flower of a different plant of the same kind. Plants like pumpkins, grapes, grasses, apples, maple trees, and daffodils pollinate this way.
Therefore the answer is grape; cross pollination.