If the house is this: <span>http://media.education2020.com/evresources/4002-06-02-04-00_files/i0170000.jpg
then the ans is </span><span>c. the roofs and terraces that jut out
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The answer is A focal point. I is <span>the point at which rays or waves meet after reflection or refraction, or the point from which diverging rays or waves appear to proceed.</span>