B. Their remote location has kept out invaders.
Horticulture is the cultivation of plants with primitive tools. I can’t see the answer choices.. but I hope this helps :)
Wind erosion is the main cause. And since it is the desert that wind can pick up tiny sand rock particles that slowly grind against the rock. Over time the erosion will give a jagged rock the smooth features as if it had been submerged in a river for the roughly same period of time.
Two factors that helped Brazil’s economic growth is foreign investments, and exports
Mauna Loa last erupted on April 15, 1984.