Which of these is a method by which some fire extinguishers work? 1 They cut off the oxygen supply to the burning substance. 2 They reflect away the heat because of their colour and thus cool down the burning substance. 3 They exert force on the substance that has caught fire because of which the fire gets extinguished. 4 They release chemicals which react with the oxygen in the air and stop it from reaching the burning substance.

Which of these is a method by which some fire extinguishers work? 1

1.	Which of these is a method by which some fire extinguishers work? 1 They cut off the oxygen supply to the burning substance. 2 They reflect away the heat because of their colour and thus cool down the burning substance. 3 They exert force on the substance that has caught fire because of which the fire gets extinguished. 4 They release chemicals which react with the oxygen in the air and stop it from reaching the burning substance.
Answer» TION:FIRST OPTION is CORRECT.