Identify the type of writing in the following extract from the options provided below.
“Crystals distinguish themselves by a regular arrangement of the constituent atoms in three dimensions. A crystal can be thought of as made up of a lattice and a basis” (Joshi,Elements of Group Theory for Physicists, 1997:209).
A.
Argumentative
B.
Explanatory
C.
Descriptive
D.
Narrative
B.
Explanatory
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