I found that being around others with a high vocabulary really helps. Be around parents more and read. If your parents say a word you don't understand, ask them what it means and use that word throughout the day.
If someone wants to increase there English vocabulary then they just have to read more books and find new words and learn how to use them and u will definetely increase ur vocabulary hope i helped!
Explanation: 2 because they talk about how we should appreciate mars, 4 because they talk about how we should be careful with mars, that shows he cares about mars.