Can somebody plz HELP ME :(

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

No debemos el medio ambiente. a. contaminar b. preservar c. desechar d. cumplir

Match each blank with the word that best fits.me llamo patricio. tengo dieciséis años, y soy de españa. no me gustan los ejercicios. por eso (this is why) _[blank 1]_ al fútbol. cuando _[blank 2]_ en un partido, no siento que (i don’t feel that) es _[blank 3]_. el fútbol es el _[blank 4]_ que más me _[blank 5]_.