ABD ss4 difference between section and elevation in Create Building views. A section is a cut through the 3d-model. An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane.
Critical thinking is that mode of thinking - about any subject, content, or problem - in which the thinker improves the quality of his or her thinking by skillfully taking charge of the structures inherent in thinking and imposing intellectual standards upon them.
Critical thinking is a meta-skill - it governs a person's facility to process information in a logical manner. A person with critical thinking skills is capable of upgrading his own knowledge and can easily engage in independent self-learning.