The answer is Aerobic exercise (such as swimming, running, climbing)
BrAiNlIeST
A “This debt we pay to human guile” ( Line 3)
Explanation:
From the poem, the writer is trying to justify the use of masks to hide our sorrows from the world so that it won't see our bleeding hearts and mouths that have been lots of "subtleties".
The central idea of the poem is to wear the mask and disguise our true feelings to the world while we pay the debt of not showing our true feelings to people that matter to us.
