I think the answer your looking for is smooth muscles and cardiac muscles. They only muscles that can be voluntarily controlled is skeletal muscles. Let me know if this is what you're looking for:)
Osmosis is the diffusion of water. Water tends to diffuse to the area with a higher concentration of solute. (Particles) In this case, Im assuming the fertilizer is the solute because it contains chemicals. Therefore, since water tends to diffuse to higher concentration of solute, the water in the grass will diffuse out to dilute the fertilizer on the surface of the grass. Without water, the grass will be dehydrated and shrivel up and die. Hopefully you find my answer helpful!
Answer:
The input or x value= spf
The output or y value= Minutes of exposure until sunburn
