Step 1: Understanding predation.
Predation refers to a biological interaction where one organism (the predator) kills and consumes another organism (the prey). A tiger preying on a deer is an example of predation.
Step 2: Analyzing the options.
(A) Remora - shark: Incorrect — The remora and shark have a symbiotic relationship (remora benefits by attaching to the shark and eating leftover food).
(B) Whale - barnacle: Incorrect — This is an example of commensalism, where the barnacle benefits without harming the whale.
(C) Orchid - tree: Incorrect — This is an example of epiphytism, where the orchid grows on the tree without harming it.
(D) Tiger - deer: Correct — This is an example of predation, where the tiger hunts and eats the deer.
Step 3: Conclusion.
The correct answer is (D) Tiger - deer, as it represents a classic case of predation.