Sand dunes are formed by wind.
Explanation: Dunes form when wind blows sand into a sheltered area behind an obstacle.
In an experiment, you used a solvent to extract fat from hamburger meat. When you are finished in the experiment, then you should put the solvent and the fat into waste containers that are specific for the solvent used in the experiment. You cannot just throw them into the sink as it may pollute and cause unwanted effect on bodies of water. Also, you cannot throw it together with other wastes as you do not know the reaction that would happen with it with the other wastes.
He managed to ensure the fight for independence. The wealthy Creole elites were controlled by the Spanish and they disliked it because they wanted to be the rulers of a new and independent country. Bolivar got their support which meant that they could now fight and get the independence that they wanted.
