Easy spanish question im just dumb

Durante un bautizo hay llena de agua. question 7 options: un velorio una vela una pila un ataúd

¿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.

Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water whichstatement best describes the correct plan for her procedure? the density and the amount of water are controls, and the amount of salt and the type of salt are variablesthe amount of water and the amount of salt are controls, and the type of salt and the density are variablesthe type of salt and the amount of water are controls, and the amount of salt and the density are variablesthe type of salt and the density of water are controls, and the amount of salt and the amount of water are variableso