"To understand the connection" means to comprehend how two or more things are related or linked to each other. It involves recognizing the way one thing influences or affects another. Full definition
There are still people out there who haven't heard of puppy mills, or who don't understand the connection between puppy mills and puppies purchased online or through pet stores. (onegreenplanet.org)
If you don't understand the connection between evolution and adaptation, you may not «understand science» as well as you think you do. (religion.blogs.cnn.com)
Finally, we need to better understand the connection between short - and long - term outcomes so that programs can be assessed accurately and quickly. (educationnext.org)