They are called Cactus! I hope it helps ;)
The outer core heats the mantle on convection currents.
Hope this helps!
Agriculture because of globalization the competition in agriculture sector has increased, US has got many of India's high earning agricultural products patent in WTO (like- basmati rice ,turmeric etc) and that's why you need to pay US government for their production
The Creature You're Probably Looking for are dinosaurs
Australia/Oceania is the smallest continent