Spanish work please help

The word bank is same for all

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

Which of the following would fit these sentences? 1. es importante comer de grupos de comidas cada dia 2. estoy (with you); los guisantes son saludables 3. en una ensalada tomates no hay muchas grasas word bank: 1. la salud, 2. bien, 3. lechuga, 4. comida, 5. que si, 6. todas, 7. prefieres, 8. de acuerdo

La fábrica ha estado tirando ese desecho industrial muchos años en el río. a. para b. por c. por ahora d. para entonces