The correct option is B Mutualism
Entomophily is the pollination by insects, plants develops colourful petals and a strong scent to attract insects such as, bees, wasps and occasionally ants (Hymenoptera), beetles (Coleoptera), moths and butterflies (Lepidoptera) and flies (Diptera) for pollination. In this case flower gives nectar as a food to insects and in turn insect help them in reproduction by pollinating pollen grains. Such example is of a mutualistic relationship. Thus, the correct answer is option C.