Can someone help and explain to me the difference between a complex, compound, and a complex compound? And what a clause is?

Lisa works 7 hours a day, 7 days a week. how many hours does lisa work in 6 weeks

What are some funy/catchy titles for my essay. the topic is tap water and its negative impacts

What kind of words would be to find the information from a database about changes in height of an ocean surface over a 20 year period