Acid rain has a negative impact on water quality, and cars and trucks emit tremendous amounts of airborne pollutants, which increase acid rain. Given these facts, which of the following has the worst effect on water quality among the following options: - bacteria - Pesticides - fossil fuels - deforestation - cars and trucks - humans disturb it - flooding - Destroy bridges
cars and trucks

Hormones are chemical messengers that control many body functions, and neurotransmitters are chemical messengers in the brain. Given these facts, neurotransmitters and hormones are what in their function among the following options: - cells - organic - inorganic - complex - Vibrates - warm - properties - similar
similar

Condensation causes clouds to form, and rainy clouds cause rain, and excess water vapor from clouds is the basis of rainbows. Given these facts, what can be caused by condensation among the following options: - rain - wind - gills - Gases - drought - heat - breeze - gas
rain