关于定语从句中the one 和that用法定语从句中以上两词在什么时候用啊?有什么区别?请举例子

the one和that在词性上都是代词.但是,the one在定语从句中是代替人或物的（He is the one who always laugh at me.),而that则是可以在人或物做主语时做关系代词,（He likes the apple that is red.)
当两个词在一起时,可以这样用
I am the one that likes to sing.