Fossils fuels are still used, but what developers are slowly starting to look for and use alternative energy resources such as solar power. what are the reason (s) why they are starting to look into alternative energy sources?

fossil fuels produce waste?
alternative energy sources are renewable?
fossil fuels are increasing in price?
all the above?

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.