Difference between it is brought and it has been brought​

In the following sentence identify the words of the subordinate clause and name its type. we believe that christianity is the key to a better world.

Then she heard his step on the stair away down on the first flight, and she turned white for just a moment. the phrase "she turned white for just a moment" is mainly used to show that della has very fair skin. is afraid of jim's reaction. is beginning to get an illness. had become extremely angry.

Which piece of evidence best supports schlossers claim that meatpacking is most dangerous job in the united states