What is the essays “The Teen Brain”central idea

Is the sentence “ironically, although approximately seventy-one percent of the earth is covered by water, thirty-three percent of its land area is desert.” a phrase or a clause?

Romeo and juliet have fallen in love, even though their families despise one another. based on the excerpt, what are the two main purposes of this prologue?

You have 24 hours to sleep, eat, work, and do all your personal tasks. which is the most effective way to do more in your day? a. eat less b. sleep less c. work more d. take more breaks