The core subject of also includes civics and government studies. a. english b. mathematics c. history d. science

The correct answer for the blank is- C) History.

Core subject is a necessity of a child to learn and become educated .There are generally four core subjects as follows:

Maths, science language arts, and history.

Out of these subjects, history contains civics ( study of rights and duties of citizens and how government works) and government studies.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.