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

Which of the following definitions best describes 'airspeed'?

A. The A climate classification, also known as the Tropical climate classification, is characterized as being consistently warm with all months averaging above 18 degrees C and having annual precipitation exceeds potential evapotranspiration (POTET).
B. A doming or small mound on the crest of a lava flow caused by pressure due to the difference in the rate of flow between the cooler crust and the more fluid lava below.
C. the concept is the speed of an aircraft relative to the ground. It is the sum of the aircraft's true airspeed and the current wind and weather conditions; a headwind subtracts from the the concept, while a tailwind adds to it. Winds at other angles to the heading will have components of either headwind or tailwind as well as a crosswind component.
D. the concept is the speed of an aircraft relative to the air. There are several different measures of the concept: indicated the concept, calibrated the concept, equivalent the concept and true the concept.

Answer: the concept is the speed of an aircraft relative to the air. There are several different measures of the concept: indicated the concept, calibrated the concept, equivalent the concept and true the concept.