A metaphor is used to compare two things without using the words 'as' or 'like' in the sentence.
Example: He is such a pig - that sentence compares two things the boy and the pig and no words such are mentioned with 'as or like' therefore it is a metaphor
She learns that she must invest more time in practice
I’m pretty sure it’s the third and last one
Weight is the measure of gravity pulling us to earth, whereas mass is the amount of matter that makes us. your mass is the same on earth and on the moon, but your weight goes down on the moon since there's less gravity. So, your weight will increase if the pull gets stronger. So say the pull gets triple stronger, then your weight will be tripled.
