Why is electromagnet widely used in electric appliances give any two reasons​

The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. ... Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel

Explanation: will you mark me plz?

There question says, the sit and reach test assess hamstring flexibility. The statement is true. The test is used to measure lower back and hamstring flexibility. It is used to determine the probability of a person having future pain and injury.It is used by fitness trainers to assess flexibility before starting an exercise program. The results obtained for the test depend on their gender and the age of the participant.