Which kind of lenses are used to correct nearsightedness (the ability to see up close but not far away)? check all that apply

a.) concave

b.) converging

c.) diverging

d.) convex

Concave and Diverging lens are used to correct nearsightedness.

Option A & C

Explanation:

There are two main problems in eyesight which are nearsightedness also known as myopia which is the inability to see the objects that are far away and farsightedness where the person suffers the inability to read without correction to eyesight.  

In this case, objects which are near can be seen properly whereas distant objects are blurred and so the person need correction in eyesight either by glasses or Concave lens and Diverging lens. It is the best suited option for those cases.

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.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.