Which ideas in this paragraph support the idea that it is important to achieve one’s dreams and help others achieve theirs?

Other countries with such divisions have in fact divided into new nations with new names, but not this one, impossibly interwoven even in its hostilities.

Explanation:

tessa’s film suffers when she refuses to deviate from her plan as obstacles arise.

the verbal in this sentence is an infinitive. when you want to know the reason of an action, you simply ask the question "why? ". once you know the reason you can answer with "because".

many times we don´t use the word "because" but we can use another expression and that is an "infinitive of purpose". example:

-why did your brother bring a book?

-he brought a book to study.

in the answer above you can see an example of an infinitive sentence, just like in the example of your text. "he couldn´t run fast enough to beat his older sister". so, the answer is infinitive.