How does Causality Manipulation give its user the ability of Adaptive Replication because I'm just wondering. I don't know a lot about this ability. I would like to know more about it.
"There is no need for a "why" however, as the why of something is determined by causality itself, which is at the users' command, making it one of the few powers that reasonably don't need a reason." from the page
Yep. they don't need any cause, or a the cause could be something so mundane as breathing or blinking. cause=get hit by or be near something, effect=replicate/mimic it.