Passengers inside the bus perceive their fellow passengers as being at rest because they are moving at the same velocity and direction as the bus.

A person standing on the roadside perceives both the bus and its passengers as moving because they observe the bus’s motion relative to their stationary position.

The relative motion between the bus and the roadside trees creates the illusion of the trees moving backward for the passengers in the bus.

The Earth’s motion occurs at a relatively constant rate, and we are part of this motion, making it difficult to perceive directly. Additionally, the vastness of space and lack of reference points can obscure our perception of Earth’s motion.

Yes, the motion of the Earth, including its rotation and revolution around the Sun, directly causes phenomena like sunrise, sunset, and changing seasons.