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").
Example: Fact1: a plant requires sunlight to grow, Fact2: Plants to avoid are fast-growing vines that can take over an area in no time., Question: What requires sunlight in order to take over an area? (A) spores (B) fish (C) plants (D) humans (E) pods (F) Oak (G) opossums (H) coral
Example solution: C
Example explanation: This is a good example. Based on the facts plants require sunlight in order to take over an area.

Problem: Fact1: Most ecosystems get energy from sunlight., Fact2: An ecosystem includes the organisms and their habitat., Question: what gets energy from sunlight? (A) Microscopic organisms (B) objects that have mass (C) peachleaf willow (D) organisms and their habitat (E) density (F) Earth orbiting the Sun (G) gravity (H) volume

Solution: D