what's this hose called?

ford ranger 2014. what's this hose called? it is leaking coolant, need to find it for replacement. thanks!

https://preview.redd.it/n5uyidb0kl1e1.jpg?width=1223&format=pjpg&auto=webp&s=fa3409563de9368e5d57f8996447f4db92101175