Task: Class Definition Understanding (ontology: Earth_Environment/EnvironmentOntology)

Which of the following definitions best describes 'raindrop'?

A. This is the class intended for use when describing raindrops on Earth. These typically have a diamter of 0.1 to 9 millimetres.
B. A droplet formed by condensation of vapour in an atmosphere and which is sufficiently massive to overcome atmospheric resistance and fall to a planetary surface due to gravity.
C. A droplet which is spherical in shape and suspended in an atmosphere, being of too small a mass to be pulled to a planetary surface by gravity.
D. A liquid fuel used in diesel engines, whose fuel ignition takes place, without any spark, as a result of compression of the inlet air mixture and then injection of fuel.

Answer: A droplet formed by condensation of vapour in an atmosphere and which is sufficiently massive to overcome atmospheric resistance and fall to a planetary surface due to gravity.