Would the bulb glow after completing the circuit shown in Fig. 2 if instead of safety pin we use an eraser?

No because an eraser is made of rubber, an insulator, which means that it would stop the flow of electricity, while a safety pin is made of metal, a conductor, which conducts the flow of electricity.

Did you ever figue this

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.