Eating food that contains pesticides can have a negative impact on humans, and pesticides are chemicals that kill pests. Given these facts, eating food that contains what can have a negative impact on humans among the following options: - vitamins - antioxidants - Abnormal cell growth - pest-killing chemicals - Something that causes allergies - harmful substances - minerals - a pathogens
pest-killing chemicals

Adoorbell converts electrical energy into sound, and speakers convert electrical energy into sound waves. Given these facts, what energy does a door doorbell need to be heard through speakers among the following options: - consumers - Solar - Motion - to move people - sensory neurons - Wind - it needs them - Electrical
Electrical

Atelephone is used for communication by humans over long distances, and telephone lines conduct electricity. Given these facts, what is used for communication by humans over long distances among the following options: - A Greek letter - electricity - airplanes - kinetic energy - trains - sign language - photons - messengers
electricity