If waif wastewater-containing phosphates from laundry detergents made its way into waterways, such as streams and rivers how would that affect the water cycle?

Phosphate is a plant nutrient. In many surface waters such as lakes and rivers, algal growth is limited by phosphate, i.e., the algae have everything they need to have a population explosion except for phosphate. So when phosphate enters the water, the algal population then increases exponentially (an algal bloom). An algal bloom fundamentally changes the trophic state of an aquatic ecosystem. As soon as the phosphate runs out, the vast mass of palgae die, causing anoxic conditions as the plant matter rots. This often leads to the death of other aquatic organisms. Some algae also produce toxins.

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.

Im not sure if you still need this but the answer is 300 hz450 hz  i just did this lesson so , wish you the best of luck and take care