Which is a layer style that outlines an object or type?

A. Stroke

The layer, obect, etc. must already be selected. One can select whether the outline is to be inside or outside. Thickness of outline is to be typed in pixels.

A.Stroke. Thank you for the invitation brother Yosef.

I leave the answer to experts and specialists in this area

A.Stroke will add routines an object and types 

stroke in Adobe Photoshop and Creat outline to type in Adobe illustrator to conver type to outline

Stroke is a layer Style that Outlines an object or type

Stroke is a style by which we can get outlined object

'Stroke' is the answer to this question.

Stroke as used in Photoshop

Thats called Stroke in Psd And Ai.which i use in most of my designes.

Layer style is effect for using for layer.. answer is Stroke.