Which of the following is true about calories?
a. calories are measured by density.
b. everyone's caloric needs differ.
c. young children need more calories than adults.
d. they are one of the basic nutrient groups.

his week a heat wave will be hitting, and most of the country will be experiencing temperatures above average for july. due to humidity, the temperature outside can feel even warmer than it actually is. this adjusted temperature, often referred to as the “feels like” temperature is called the heat index. the chart shows the heat index, which is calculated based on temperature and relative humidity. use this chart to answer the following questions.