Can anyone answer this please?

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?