When something in a drawing is difficult to draw for some reason-
Change it. For example, if limbs are making themselves difficult, and in the drawing, it would look unnatural or change the meaning to have the limb hidden (like an arm behind the person's back), as long as you know the basic proportions, just draw clothes around it. Or, do the opposite, make it a skeleton/zombie, whatever works. For nature, you can draw something to cover what you are having issues with, put some grass or flowers or trees to cover over it or try changing the plant or whatever to a different type of plant. And if it's animals, you can draw something from their habitat to block that part. Seaweed in front of a fishtail, a tree branch in front of a deer torso, part of a fence, or some tall grass in front of some sheeps' legs. Things like that. Use your imagination.