<u>#1</u>.
By definition, a <u>line</u> is a collection of points extending continuously in two opposite directions.
Thus, as per this definition, the term that best describes a figure that extends continuously in two directions is a line.
Therefore, option B is the correct option.
<u>#2</u>.
By definition, A <u>transversal</u> is a line that intersects two or more co-planar lines at different points. Thus, as per definition, a line that intersects two other lines is called a transversal.
Therefore, option C is the correct option.
<u>#3. </u>
Two intersecting lines form a pair each of vertically opposite angles. Thus, two intersecting lines make <u>4 angles</u> in total.
Thus, <u>option B </u>is the correct option.