Select the correct answer. what causes magma in the lower mantle of earth to rise up toward the crust? a. the moon’s gravitational force acts on the magma. b. the core of earth expands. c. the density of the magma decreases. d. the volume of the magma decreases.

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Number and variety of living organisms includes genetic, species, and ecological types