As the landforms name implies, another process plays a role in floodplain formation. which of the following describes this process?

Answertrue:

Ithink i might know wait one second let me serve

1. why do astronomers think that there may be other advanced civilizations?
because  it was discovered that there are other planets like earth out there, able to  accommodate life forms.
2. what technologies are astronomers using to look for life on other planets? why?  
they  have used radio telescopes, but now they use laser telescopes   to track laser communications.

If its a multiple choice answer as i believe it is the correct answer is c