The answer is D, noble gases are stable.
Answer:
we need tropical rain forests because they produce oxygen and clean the atmosphere to help us breathe. They also provide us with medicinal plants and may be the source to cure deadly diseases.
<span>The best answer is (d) water from snowmelts. The American Southwest has many mountains that catch moist air moving westward (from the Pacific) that falls as snow during the winter. The snow melts gradually during the spring and summer when there is little precipitation. The melted snow runs off the mountains into rivers and streams that can be tapped by irrigation pumps. The snowmelt also sinks into the ground, replenishing underground aquifers that can be tapped by wells in the valleys where farming takes place.</span>
Answer:
its the world's longest unfortified border :))
Usually the southern section is rainy and cool, and the central section is more dry. While the northern Andes are typically rainy and warm, with an average temperature of 18 °C (64 °F) in Colombia.
hope this helps, have a nice day
