The SI unit of measure for length - the meter - would be most appropriate when

A:Measuring the wingspan of an insect

B:Measuring the height of a building

C: measuring the length of an ant

D:Measuring the distance between two cities

Answer: - The correct answer is B. measuring the height of a building.

Explanations: - Insects and ants are very small. So, meter is not the right unit of measure their length. Their lengths would be measure in mm that is millimeters. So, options A and C are not good.

The distance between two cities is mostly too much so it's measured in kilometers or miles. So, D is also not good.

Height of buildings is measured in meters and so the correct option is B.