You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

Q: Question: If Milo is experimenting in his lab and he increases the temperature in the room, what happens to the energy of the particles in that room?
Option1: it increases
Option2: it decreases
Explanation: At higher temperatures, particles of reactants have more energy, so they move faster.

A: it increases
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Q: Question: Mary loves to observe the Sun. If she's looking at the Sun one day and notices more sunspots then she usually sees, what is happening to the amount of solar energy reaching the Earth?
Option1: increasing
Option2: decreasing
Explanation: When there are more sunspots the Sun is more active and there are more solar storms and more of the Sun's energy reaches the Earth.

A: increasing
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Q: Question: When we get to the bottom of a mountain the air is
Option1: more dense
Option2: less dense
Explanation: At higher elevations, there is less air to press on a given area.

A:
more dense
****