Create para ,apply border soild ,change the dimensions to 100 x 100

Answer 1

What is para .?
Do like this
<div class ="para">
</div>

<style>
.para{
border : 2px solid green;
height :....
width:.....
}

Answer 2

I assume para is short for paragraph.

So instead just do

/* element to style */

p {

/*property : value; */

border: ;
height: ;
width: ;
}

Fill in he correct values.