In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Q: Fact1: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Canyon formed as a consequence of river erosion., Question: what does erosion form? (A) valleys (B) Sediment (C) mountains (D) canyons (E) soils (F) hills (G) soft soil (H) loose soil

A: D
****
Q: Fact1: rest has a positive impact on a health, Fact2: Relaxation rests the body and meditation rest the mind., Question: Relaxation of the body has a positive impact on a what (A) intelligence (B) sight (C) consumers (D) health (E) growth (F) career (G) humans (H) survive

A: D
****
Q: Fact1: Many corals secrete an exoskeleton that builds up to become a coral reef., Fact2: Coral Reefs Coral reefs are the jungles of the sea., Question: many corals secrete an exoskeleton that builds up to become what? (A) important habitats (B) jungles of the sea (C) seaweed (D) gastropod shells (E) food and shelter (F) dolphins (G) major threat to health (H) oceans

A:
B
****