A is very general in nature, while a specifies what we want to study more specifically, suggesting the key concepts we need to know Group of answer choices research topic; research question (hypothesis) non-systematic idea; systematic idea systematic idea; non-systematic idea research question (hypothesis); research topic

research topic and research question (hypothesis)

Explanation:

where’s the list ? the question is incomplete

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.