Answer :
Final answer:
The typical color and shape of a warning sign are yellow and diamond-shaped, universally used to grab attention and alert drivers to potential hazards.
Explanation:
The usual color and shape of a warning sign are yellow and diamond-shaped. This is a universally accepted color and shape used for these kinds of signs, known for its conspicuousness and visibility. For example, a typical road warning sign of this style could indicate upcoming roadwork, sudden changes in the road's direction, or the presence of school crosswalks. Therefore, the correct answer to your question is option B.
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