Answer in English please

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 is the first-person singular (yo) form of the verb "to think" in present tense? a. pienso b. penso c. piensa d. pensamos

68. si tengo que lavar la ropa, estoy en a. el jardín b. la recamara c. el desván d. el lavadero 69. si tengo que cortar el pasto, estoy en b. la recamara c. la sala de estar d. el lavadero the table 70. si tengo que poner la mesa, estoy en a. la cocina b. el comedor c. la recamara d. la sala d. la sala 71. si tengo que preparar la cena, estoy en a la cocina b. el comedor c. la recamara d la sala