Is this a trigger or ability??

Is this a trigger or ability??

In some maps that i have played, some units generate gold, for example 1 gold/sec. Is this a trigger or ability? If this is a trigger, pls tell me how to do it, and if its an ability, tell me which ability. Thx

It's a very simple trigger to make.

Events -
   Time - Every (10.00) seconds of game time

Conditions -
   *

Actions -
   Player - Add (Numbers of units of type (Unit) controlled by (Player)) to (Player)'s current gold

The action will add 1 gold to the player every 10 seconds for each one the units of a certain type that player possesses.

Which action category is that action in?? But can it not be 1 gold, maybe more?

The action is located in the "Player" category.

You can add more by choosing "Arithmetic" in the action and adding the number of units to a preset number of your choice.

Am I clear enough? Tell me.

k thx