Which of the following describes a meteor?

a. Large objects (> 10 m) in space originating from a region between Jupiter and Mars

b. Small objects (< 10 m) in space originating from collisions of asteroids

c. Small objects that burn up in Earth's atmosphere

d. Objects that survive passing through Earth's atmosphere and hit the ground

Answer: Option (b) is correct

Explanation:

Meteor is described as metallic or rock body that is present outside the space. It is usually small in size ranging from grain size to less than 10 m object. They are usually referred as shooting stars. These tends to occur due to asteroid collision which makes them enter Earth's environment.

Other options are incorrect because large objects that are more than 10 m, objects burning in Earth's environment and objects that pass through Earth and hit ground are not considered as meteors. Thus, the correct option is option (b).