The main impact of ozone on life on the Earth's surface is to Group of answer choices provide oxygen for the atmosphere reduce ultraviolet solar radiation serve as a nucleus for cloud formation act as a lid preventing gases from escaping initiate violent storms

How do hearths affect cultural diffusion? a. a hearth is the destination of cultural diffusion. b. a hearth divides a cultural region in two. c. a hearth is the beginning point of cultural diffusion. d. a hearth is the means of cultural diffusion. e. a hearth is the meeting point of two diffuse cultures.