D, combination of all the them
The ocean floor spreading showed that it is possible for landmasses to move.
The Amazon River is the world's longest river, measuring 6 992 km.
Answer:In primary succession, newly exposed or newly formed rock is colonized by living things for the first time.
Explanation:
In secondary succession, an area previously occupied by living things is disturbed—disrupted—then recolonized following the disturbance.