Step 1: Understanding the Concept:
The IUCN (International Union for Conservation of Nature) keeps the Red List, which records the conservation status of species across the world.
Species are grouped as extinct, critically endangered, endangered, vulnerable and so on.
Step 2: Check the Assertion:
Because the list points out which species are in danger, it helps in planning protection. (A) is TRUE.
Step 3: Check the Reason:
The Red List does include species that are at risk of extinction. (R) is TRUE.
Step 4: Does R explain A?:
The list can help in identifying endangered species precisely because it includes those facing extinction risk. So R explains A.
The code is (A).
Final Answer:
Both are true and R explains A. Option (A) is correct.