selector selector

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
</head>
<body>
<p>Hello World!</p>
<p>Привет Мир!</p>
<div id="d0">
<p>To be or not to be?</p>
<div>
<p>Быть или не быт?</p>
<p>My name is Sergey</p>
</div>
</div>
<p>I live in Ukraine</p>
<script>
$(document).ready(function() {
$('#d0 p').css({'color': '#F00'});
});
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
</head>
<body>
<p>Hello World!</p>
<p>Привет Мир!</p>
<div id="d0">
<p>To be or not to be?</p>
<div>
<p>Быть или не быт?</p>
<p>My name is Sergey</p>
</div>
</div>
<p>I live in Ukraine</p>
<script>
$(document).ready(function() {
$('#d0 p').css({'color': '#F00'});
});
</script>
</body>
</html>