A keystone species is one that A. Eats a mixture of plants and animals. B. Is introduced into a community after a major disturbance. C. Causes the amount of diversity in a community to decrease. D. Helps to stabilize the populations of other species in the community

Which statement best describes the use of the underlined word in the excerpts? in excerpt 1, it refers to personal growth, while in excerpt 2, it suggests the physical act of moving. in excerpt 1, it refers to personal growth, while in excerpt 2, it suggests scientific discoveries. in excerpt 1, it refers to societal advancement, while in excerpt 2, it suggests the gradual march of time. in excerpt 1, it refers to societal advancement, while in excerpt 2, it suggests steps toward a particular goal.