At the beginning of canto ii, dante invokes the muses. what does dante promise he will do in return?

Dante promise he'll tell of their greatness in return.

Explanation:

At the beginning of Canto II as Dante is about to cross Hell he realizes that he might not be as worthy as those who have had similar journeys ard returned from them so he invokes the Muses, the ancient goddesses of art and poetry, and promise them to tell about their greatness as he comes back to world of the living, and then he knows about the aid he will receive from Beatriz to make it through hell and be able to come back and keep his word.

in other words

to put it differently

for one thing

as an illustration

in this case

for this reason

to put it another way

that is to say

with attention to

by all means

important to realize

another key point

first thing to remember

most compelling evidence

must be remembered

point often overlooked

to point out

on the positive side

on the negative side

with this in mind

notably

including

like

to be sure

namely

chiefly

truly

indeed

certainly

surely

markedly

such as

especially

explicitly

specifically

expressly

surprisingly

frequently

significantly

particularly

in fact

in general

in particular

in detail

for example

for instance

to demonstrate

to emphasize

to repeat

to clarify

to explain

to enumerate

no, but sometimes i do.