Fill in the Blank: The first species that colonizes a new or barren area and forms soil is
known as a

voyager species
pioneer species
keystone species
primary consumer

the correct option is option a

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

not too sure but maybe in the hot springs.