Question 18 The picture below shows a model of a weather instrument made with simple objects. Stopper Clear Plastic Soda Straw Glass Bottle Colored Water The change in the height of water in the straw of the model instrument is noted at regular intervals of time. Which of these best describes the function of the model instrument? (1 point) To increase the humidity of air by changing water to vapor. o To reduce the temperature by increasing the moisture in alr. To predict storms by measuring the atmospheric pressure To measure the amount of rainfall by collecting water in the straw.