<span> They are formed over many years when windblown </span>sand<span> is trapped by beach grass or other stationary objects. ... Without vegetation, wind and waves regularly change the form and location of </span>dunes<span>.</span>
Answer:
Positive
Explanation:
If you sound positive people around you will understand your speech better and think you take it seriously, but if you sound negative, then they won't take you seriously and will not understand the point you are trying to make.
But thats just my opinion.