I will answer for this
chemistry is our life 70 percent of our body is chemistry 
Body is made up of chemical compounds, which are combinations of elements. Probably know body is mostly water,  which is hydrogen and oxygen
chemistry is used in our daily life
Everything is made of chemicals. you are made of chemicals. So is your dog. So is your desk. So is the sun. Drugs are chemicals. Food is made from chemicals.
Many of the changes you observe in the world around you are caused by chemical reactions. Examples include changing colors of leaves, cooking food and getting cleaned.