There is no "following sentence" so I don't think you're ever gonna get an answer...
Hard court surface since the ball can bounce on a hard surface
The answers are *It increases the strength of the verse’s foward movement.* and *It creates a sense of unity among the actions shown.*
If you come to the cabin this weekend, either we can<em> water-ski</em> or we can take a <em>canoe</em> out for some fish<span>ing.
</span>Incorrect,
If you come to the cabin this weekend, we can either go waterskiing or take a <em>canoe </em>out for some fishing.
<em>Incorrect, </em>
If you come to the cabin this weekend, either we can go waterskiing or take a <em>canoe</em> out for some fishing.
<span><em>Incorrect, </em></span>
If you come to the cabin this weekend, we can either <em>water-ski</em> or <em>fish </em>from a <em>canoe</em>.
<em>CORRECT </em>actions are constant.