The question asks which option best describes the given figure. The figure shows two lines intersecting at a 90-degree angle, indicated by a small square at the intersection point.

The answer choices are:

• A. Acute angles (angles less than 90 degrees),
• B. Obtuse angles (angles greater than 90 degrees),
• C. Parallel lines (lines that never intersect),
• D. Perpendicular lines (lines that intersect at a 90-degree angle).

Since the two lines intersect at a right angle (90 degrees), they are perpendicular lines.

Answer:

D. Perpendicular lines

Would you like more details or have any questions?

Here are some related questions to deepen your understanding:

1. What defines a pair of lines as perpendicular?
2. How can you distinguish between parallel and perpendicular lines in a diagram?
3. Can perpendicular lines create angles other than 90 degrees?
4. Why are acute and obtuse angles not the correct answer in this scenario?
5. How would the diagram change if the lines were parallel instead of perpendicular?

Tip: Remember, perpendicular lines always intersect to form four right angles.