If glass is used for refracting light, then what is used to refract light? Answer choices: - glass - stone - a wave - fibers - tube - copper - rocks - sand
glass

If yoga increases a body's strength, then yoga does what? Answer choices: - decreases flexibility - recovery time from fatigue - faster movement - increases a body's strength - absorb light energy - Something that is self-aware - reduces a body's strength - causes stress
increases a body's strength

If the leg straightens when muscle fibers get shorter, then what happens to your leg when muscle fibers shorten? Answer choices: - they bend - It decreases - It straightens - permineralization - It expands - Damages them - Localized damage - Dehydration
It straightens