Explanation:

Rice ($Oryza$ $sativa$) is primarily a wind-pollinated (anemophilous) crop. Its flowers are typically small, inconspicuous, and lack nectar or scent, relying on wind to carry pollen from one plant to another. In contrast, Papaya, Mustard, and Coffee are largely insect-pollinated (entomophilous). Papaya often relies on insects for cross-pollination, Mustard flowers are attractive to bees, and Coffee flowers are also primarily pollinated by insects, especially bees. Therefore, Rice stands out as not being insect-pollinated.