The right option is; b. the water caused an increase in temperature of the air inside the ball and an increase in pressure.
The dent (hollow area formed by pressing or hitting) from the ping-pong ball disappeared because energy was transferred from the hot boiling water in which the ball was placed to the air inside the ball. This transferred energy will increase the temperature of the air inside the ball and the air molecules will begin to move faster with a greater force. Hence, causing an increase in pressure.
Cholesterol is the answer <span />
So when one scientist turns around and says the mass of an electron is 9.10938291×10^-31 kilograms we know what a kilogram is and so we don't get an answer that it's 32949 microsmiths as he invented his own measurement because he needed one.
This best illustrates that the experience of pain is influenced by top-down processing.
Top-down processing is a level of a perceptual system which is based on how the brain utilizes information that has already been conveyed into the brain by one or more of the sensory systems (vision, touch, or hearing). Top-down processing begins with thoughts which move down to lower-level of the perceptual system such as the senses. With top-down processing, an individual’s experience of pain may be increased when he is aware that others are experiencing pain.