Which of the following phenomena can be attributed to mechanical a) the car gives a signal

Which of the following phenomena can be attributed to mechanical a) the car gives a signal b) the snow brought into the warm room melts c) the bottle falls from the shelf

a) The car gives a signal – a sound phenomenon based on the transmission of mechanical vibrations of particles of the medium.
b) Snow brought into a warm room melts – a thermal phenomenon. There is a change in the properties of the body when the temperature changes.
c) The bottle falls off the shelf – a mechanical phenomenon. The book changes its position relative to other objects, it makes a mechanical movement.