The organisms "Cicada, Froghopper and Pond skater" are:

Answer

Insects

(a) Birds: Cicada, froghopper and pond skater are not birds; they are small arthropods with six legs and segmented bodies. Verdict: Incorrect.
(b) Fish: None of these are aquatic vertebrate fish; pond skater only lives on water surface but is still an insect. Verdict: Incorrect.
(c) Insects: Cicada is an insect, froghopper is an insect, and pond skater (water strider) is also an insect. Verdict: Correct.
(d) Reptiles: These organisms are not reptiles; reptiles are vertebrates like snakes and lizards. Verdict: Incorrect.