Well all living organisms require oxygen to survive, and all bodies of water on this planet are usually heavily oxygenated, which im guessing is where the underwater plants get all their nutrients from. hope this helps!
Answer:
Trans-Saharan trade requires travel across the Sahara between sub-Saharan Africa and North Africa. While existing from prehistoric times, the peak of trade extended from the 8th century until the early 17th century. The Sahara once had a very different environment
Answer The friction force points against the direction that the object would slide without friction. Static friction keeps gravity from pulling the cheese down the incline. Figure 1. Cheese resting on an incline because static friction holds it in place
