Doing a crossword. A 4 letter word for a food that “lives in the water”. The third letter is S. Any ideas?

¿debo hacer una reservación antes de irme? a. es buena idea que hagas una reservación. b. es buena idea que haces una reservación. c. es buena idea hacer una reservación.

What is one difference between schools in spain and costa rica? a. the lunchtime for students b. the two class shifts available c. the time when school starts d. the school food menu choices

Choose the correct use of the spanish preposition para in the following sentence. para aprender un idioma bien, hay que practicar fuera del salón de clases. "in order to," followed by an infinitive "to," referring to a destination "by," referring to a deadline intended for a goal or destination