Answer:

Physical activity is defined as any voluntary bodily movement produced by skeletal muscles that requires energy expenditure. Physical activity encompasses all activities, at any intensity, performed during any time of day or night. It includes exercise and incidental activity integrated into daily activity. 

What happen dear ..

why r u sad ...

don't be sad ..

Agar aapka koi enemies hai yeh toh bhut acchi baat hai .. coz!!! frm enemies only we get a good lesson in our life ^_^ ..

so don't be sad ..

just keep smiling ok..