I'd say that it affects your health by 'increasing your level of physical activity', because it is important to be active, and even the use of a basic hand tool like a screwdriver can impact that.
Answer:
b.
Explanation:
with all the other options you wont be able to focus
In order to find the median for any set of numbers, you must put the numbers in order from least to greatest. In this case, the order shall be: 3, 4, 18, 23, 29. Now, all you do is look at the number in the middle, which is 18. The median of this set of numbers is 18.