Explain how wildfires restore soil nutrients to forest ecosystems.

The wildfire affects soil properties. The reason is the organic matter (OM) located on, or near, the soil surface which is rapidly combusted. These changes on the other hand affect the underlying soil. The chemical, physical, and microbiological properties of the underlying soil is influenced. Also, wildfire lead to loss of nitrogen, which is very important part of the forest ecosystem.

think its the third option

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards