p:nth-child(2){
    color: orange;
    text-decoration: underline;
}

p:nth-of-type(2){
    color: blue;
}

#div3 p:nth-of-type(2){
    color: red;
	/*aussi 2ème enfant, 
	donc souligné,
	orange devient rouge*/
}
#div3 p:nth-child(1){
    color: green;
}