Answer:
I think its the first one
sry if I'm wrong
When Carlos's grandfather migrated to the United States, he had completed six years of schooling and was an agricultural worker in California. Carlos's father completed high school and worked for twenty years as a clerk in a large state agency. Through the efforts of his father and grandfather, Carlos was able to graduate from college and medical school, and he now has a thriving medical practise in Southern California. Carlos's family exemplifies intergenerational mobility.
You're looking at an ancient sand dune. What this means is that the place used to be like a sandy desert, similar to those in Africa. That is because the composition of sand is mostly silica, which appears in the form of quartz.
