Answer:
Primary is firsthand, secondary is viewed through articles and other materials.
Explanation:
EX: Primary account of a story, secondary view through pictures.
I think the answer should be answer D.
Step 1: Collection. The first step in the recycling process is always collecting the plastic material that is to be recycled. ...
Step 2: Sorting. ...
Step 3: Washing. ...
Step 4: Resizing. ...
Step 5: Identification and separation of plastics. ...
Step 6: Compounding.
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