What is the speaker commemorating in lines 19–22 of the ode "to autumn"?

a. the heat and work of the season

b a belief in the laziness of the season

c the ease and peacefulness

of the season

d the difficulty of finding workers in autumn

C. The ease and peacefulness  of the season.

Explanation:

John Keats' poem "To Autumn" is an ode that pays homage to the season of autumn. Personifying the season, he details the season from the late maturation of the crops till the harvesting season.

Lines 19 to 22 of the poem goes like this -

And sometimes like a gleaner thou dost keep

  Steady thy laden head across a brook;

  Or by a cyder-press, with patient look,

     Thou watchest the last oozings hours by hours.

These lines personified the season autumn as someone like a gleaner, who gleans the fields for the last piece of grain. Or as someone who is watching the pressing of the cider from the apple. These four lines seem to be a commemoration of the ease and peacefulness of the autumn season.  

d. football allowed the narrator and his father to reconnect after his parents' divorce.