Correct. This paragraph is full of "shoulds" which would imply that it is opinion. Where is the topic sentence?
14. Keep your Christmas tree outdoors until you are ready to put it up. Never use
lighted candles. Be sure to use UL approved lights and throw out defective lights. There are things you should do to avoid a
Christmas tree house fire. Always turn off the tree lights before you leave the house. Get rid of the tree before it completely dries out.