Final answer:
To make a dinosaur's head look stretched forward, use the technique of foreshortening, which exaggerates and shortens the lines of the parts closer to the viewer, creating an illusion of depth.
Step-by-step explanation:
If you are drawing a dinosaur and want to make it look like its head is stretched forward toward the viewer, the technique you should use is foreshortening. Foreshortening is a method for creating the illusion of depth by exaggerating and shortening the lines of the part of an object that is closer to the viewer. This mimics how objects appear to the human eye; as objects come closer to us, the parts nearer to us appear larger than the parts that are further away. Therefore, in your drawing, if you foreshorten the dinosaur's head, it will appear to be reaching towards the viewer.