Question

Which correctly lists three factors that are important to consider when forecasting weather?

clouds, isotherm, butterfly effect
isotherm, air pressure, temperature
air pressure, temperature, clouds
temperature, clouds, isotherm

Answer 1

air pressure, temperature, clouds

These are direct meteorological variables used in forecasting (pressure and temperature determine air movement and stability; clouds indicate moisture and precipitation). "Isotherm" is just a map line showing equal temperature, and "butterfly effect" is a chaos concept, not a direct measurable weather factor.