Pls help me i need this

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

What is the most important factor in determining climates.

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.