What's the name of this section, and why is it broken? F150 XLT 5.0 (2016)

Could someone please identify the items (T connectors and associated hoses) that are circled? I noticed the truck was overheating and decided to lift the hood when I stopped over. Upon closer inspection, I saw that the T connection beneath the other one was oozing coolant and steaming.

My coolant seems to be low every time I check, therefore I’m thinking there’s a leak. But why would there be a leak? Or would it simply wear out?

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Goddamn! Do you realise how much of a nuisance it is to fix? or whether I could just swap out the connectors?

Replace the entire line if you’re going to be in there removing items. The hoses won’t lag behind if the connections go.

Daaaaaaaaamn. You’re correct.
I don’t know i hadn’t thought of that

I recently changed the entire assembly; it’s not too awful. It’s atrocious, but it’s over in a few hours.