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").

Fact1: planting trees has a positive impact on an ecosystem, Fact2: An ecosystem contains many habitats., Question: doing what with trees has a positive impact on habitats (A) making tables (B) chopping down (C) planting (D) watershed (E) earth (F) bloom time (G) growth (H) timbering
C

Fact1: Rivers are usually larger than streams., Fact2: Watersheds are creeks, streams and rivers., Question: What is a river also? (A) storing water (B) loose soil (C) dangerous (D) fertile (E) more abundant (F) watershred (G) body water (H) kinetic
F

Fact1: a solution is formed by one substance being dissolved in another substance, Fact2: Another dissolved substance in ocean water is a type of rock called limestone ., Question: A solution is formed when limestone is dissolved in what? (A) old caves (B) habitats (C) body water (D) rainfall (E) calcite (F) sandy shores (G) evaporation (H) ocean water

H