Why does my iohone 5c restart itself?

So recently my phone just goes to that apple screen when it restarts when i'm using an app but like 10seconds later its back to normal. Why does it do this? And no answers saying its because iphones suck please.

Double-Click the Home Button, swipe out all of the apps which are just apps that are running in the background. Then hold down the Power Button and Home Button until the phone shuts off and the Apple Logo comes up.

This SHOULD help.

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