/*Descendant*/
main li {
font-size: 90%;
}
ul a {
color: green;
}
/*Adjacent Sibling*/
h2+p {
margin-top: .5em;
}
/*Child*/
main>p {
font-size: 80%;
}
li>a {
color: gree;
}
/*General sibling*/
h2~p {
margin-left: 2em;
}