Question

movement of rivers and oceans
the constant flow of water transforms the surrounding environment.
mountain formation
mountains are formed by movements and geographical accidents.
crystallization
during the cooling process of magma, crystallization begins as a consequence of the decrease in temperature.
different geological processes act at different rates. ranging from extremely fast acting on fractions of seconds to minutes to days to very slow acting over millions to billions of years.
click on the card that represents a fastest process

Explanation:

Movement of rivers and oceans can change the environment relatively quickly, like in floods or high - tide events. Mountain formation occurs over millions of years due to tectonic activities. Crystallization of magma also takes a long time as magma cools slowly beneath the Earth's surface or during volcanic eruptions. So, the movement of rivers and oceans is likely the fastest process among the three.

Answer:

Movement of rivers and oceans