Step-by-step explanation:
Energy is the strength or ability to do work.
When an ocean wave at the beach knocks over a sand castle then we can say that kinetic energy of waves is turned into mechanical energy.
When your house plant grows better when it is placed in sunlight then it is using solar energy for its growth.
When you eat breakfast in the morning, you have more energy for your school day as it helps in changing potential energy into mechanical energy.
When you drop a plate it breaks into pieces then it shows that potential energy has converted into kinetic energy.
Your hair dryer works when you plug it into an electrical outlet then it shows that electrical energy has converted into mechanical energy.