The best surface to run on is one that's
a. smooth and soft so that it can cushion the stresses of running.
b. uneven so that the tendons and ligaments in the ankles and knees are strengthened.
c. hilly so that you can improve your cardiovascular endurance.
d. as hard as possible so that it adds more stability to your foot.

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.  

cutting out negative people, changing their diets, exercising, taking off days from work or school, etc