Which of the following is an oxidation reduction reaction

Oxidation is lost of electrons. Reduced is gain of electrons. you can also remember them as OIL RIG.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101