Answer:
Paul left his picture, the one with the gold frame, when he left last week.
Explanation:
There should be a comma after describing the subject and one before
The yellow-crowned night-heron and the blue heron nest rarely.
That would be <span>a connection between two or more things. (Mutual relationship works as well)
If we are talking about statistics then it would be </span><span>a quantity measuring the extent of interdependence of our variable quantities.</span>
