Step 1: Understanding the Concept
Bright colours, scent and nectar attract animal pollinators.
Step 2: Apply
Plants pollinated by wind (anemophily) or water (hydrophily) do not need to attract animals. Their flowers are small, inconspicuous, colourless and lack nectar and fragrance.
Step 3: Why the other options fail
Entomophilous, chiropterophilous and ornithophilous plants depend on insects, bats and birds, so they need showy or scented flowers.
Final Answer:
These are adaptations of anemophilous and hydrophilous plants.
\[ \boxed{\text{(A) }\text{anemophilous and hydrophilous.}} \]