A stimulus can be defined as an external object or event which comes in contact with the living being is responsible for developing physiological or psychological responses against it.
A positive psychological stress can lead to encouragement and motivation. Negative psychological stress can lead to anxiety, lack of confidence, distress and feeling of failure.
The answer is fats. You need protiens and water. Carbonhydrates are things like suger and starch. Carbonhydrates are your bodys main sorce of energy in a heathy balenced diet.
