Question

which is the best example of using proper ergonomics while studying?
valeriya studies at her desk with her feet on the floor.
asher studies from his laptop whenever he rides in the car.
avani studies while sitting cross-legged on the floor.
tamir studies lying in bed, propped up by his elbows.

Explanation:

Proper study ergonomics requires a stable, supported posture that aligns the spine, hips, and limbs. A desk with feet flat on the floor provides a neutral, supported position. Studying in a car, cross-legged on the floor, or propped in bed creates unstable, misaligned postures that violate ergonomic principles.

Answer:

Valeriya studies at her desk with her feet on the floor.