Explain how the particles of air inside the balloon create pressure

Inside the balloon, the gas particles collide with the balloon's inner walls.As the molecules heat up, they move faster and strike the inside wall of the balloon harder. This increased motion of the gas particles increases the force on an area of the balloon, producing a rise in the pressure.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

yes it is balanced