Physical effects refer to the way our bodies respond to things in our environment, like exercise or even something as simple as eating food. When we exercise, our muscles get stronger and our heart gets healthier. When we eat good food, our bodies get the energy and nutrients they need to keep us healthy.
Just like eating and exercising affect our bodies physically, other things like drinking too much alcohol or smoking can have negative physical effects on our bodies. When we drink too much alcohol, it can damage our liver and make it harder for our bodies to fight off infections. Smoking can cause lung and heart problems and make it harder for us to breathe.
Basically, physical effects are how our bodies respond to things in our environment, and we want to make sure we're doing things that have positive effects on our bodies so we can stay strong and healthy.