Causes of Fluctuating Body Temperature. Naturally, your body changes its temperature to comply with the changes in your surroundings, which has been experienced by everyone. Your body will lose heat when the temperature of your surroundings is on the higher side.n the other hand, your body will try to keep it warm when the temperature in your surroundings is low. Your body completes the task by making your blood vessels to send blood from small capillaries to the warm parts of the body, which in turn signals your muscles to shiver.
Donât Skip a Step. 1  A child who has outgrown the internal harness or height limitations of a forward-facing child safety seat. 2  Within the range of 40 to 80 pounds but under 4â9â. Within 4 to 8 years of age and is at least 35â tall.
Please remember to keep your kids in a booster until they are 4' 9. Age and weight aren't as important as height when making the decision to ditch the booster. By 4' 9, the adult seat belt will fit most kids properly.