Add punctuation: Heaps of shrimp jitter and a single shrimp has jerked its way to some live crabs
A: Heaps of shrimp jitter, and a single shrimp has jerked its way to some live crabs.

Add punctuation: to make sure your kid doesnt have access to your own start screen you can set a signin PIN
A: to make sure your kid doesn't have access to your own start screen, you can set a sign-in PIN.

Add punctuation: Luc Stehelin from 1940 expanded the wine production from the fields around the castle Cotes du Rhone
A:
Luc Stehelin (from 1940) expanded the wine production from the fields around the castle (Cotes du Rhone).