Question

why are meteorites considered dangerous?
they are very large in size
they are traveling at high velocities(speed).

Explanation:

Meteorites can be small, but their high velocity means they have a large amount of kinetic energy ($KE = \frac{1}{2}mv^2$), which can cause significant impact damage. The first option is incorrect as many meteorites are small. The second option is correct because high velocity gives them destructive potential.

Answer:

The correct option is: They are traveling at high velocities(speed).