Hey man!
The discovery of large oil reserves, this is the principal actor that changed the modern countries in the arabian peninsula. One of this examples was the Iraqi War when Saddam Hussein invaded Kuwait.
Trees take in carbon dioxide and other gases that we cannot breathe in and gives us oxygen. It also helps other plants and animals nourish themselves. To some animals, trees are their habitat so by planting more trees, we are technically building a habitat for plants and animals to live in. It's also good shade on a sunny day.
The form of energy would be C)Geothermal energy. Geothermal energy is heat within the earth so people can use this heat as steam or hot water to heat buildings and generate electricity
Answer: southern, southern has the most density.