At the end of the declaration of independence, what promise do the signers make

After signing the declaration of independence  they pledged their lives,fortunes, and sacred honor and this was a big deal to them  because they were promising everything to the freedom of the US so that it could be free  from British rule.

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

to inform readers about the ways young people improve the world.