A. Earths atmosphere contains 78 percent oxygen, which is essential for life.
A=along the bodies of water
Answer is D. Explanation because it is
The two Rivers that meet at the mouth of Rio de la Plata forming its estuary are Rio Parana and Uruguay. Parana river runs through Central South America,Brazil, Paraguay, and Argentina some 4,880 kilometres .Uruguay river runs north to south and separates boundaries of Brazil, Argentina, and Uruguay.
