Charles Boyle was a scientist who studied the relationship between the temperature and pressure of gases. According to Boyle, at a constant
temperature, the volume of a gas decreases as the pressure increases.
Which of the following terms describes Boyle's statement about how gases
behave?
A. Hypothesis
B. Observation
C. Theory
D. Scientific law

i believe the answer is a or 1

so whats the answer

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

b a mature ovary of a plant.