Why is it essential to sow seeds at the correct depth and distance?

Question

Why is it essential to sow seeds at the correct depth and distance?

Answer 1

it is necessary to sow them in correct depth so that it can get essential nutrients from deep below the soil.

it is necessary to sow them in correct distance so that all of them get proper sunlight and nutrients and do not fight for the components.

Answer 2

If you plant them too deep the seedling might not be able to reach the surface. It will die underground.

Some seeds require light to sprout, and must be planted shallow.

If you plant too shallow, the birds will get them.

If you plant too close, the seedlings will compete for light and be thin and spindly.

Answer 3

If you plant seeds too deep, they will not get warm enought to sprout.  You need to space plants so they will not take nutrients/ water away from other plants.