I'm assuming we're applying the standard Integral form of the calculation of work. The solution is provided in the image.
The answer would be the sound waves.
For me: WASH OUR HANDS REGULARLY
Answer:
Explanation:
1) Hypermetropia (better known as Farsighted- this is why nearby objects seem blurry for him)
2) In such instances, image are typically formed farther from the near point
3) Such defects are quite common so there are common procedures such as using convex lens which can restore the sight to normal.