I basically need help with all questions, i don’t understand the assignment :(?

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as