1No I do not agree with Marta because there is always another way to help Esperanza and her family.
2 it would be different because with all of the new technology that we have today, it would be harder to not be noticed. Also, in this day, everything is more expensive and you can't get into a big bus for free. Lastely, some people, not naming who, don't want anybody coming in and out from Mexico, or anywhere out of the United States
Based on the given sentences above, the one that is punctuated correctly is the second sentence: She sends an email therefore, to her instructor and advisor. What makes the first sentence incorrect is that, it has no period at the end of the sentence. Hope this answer helps.
Claim is used when referring to a thesis statement, while thesis is used when referring to an explanatory statement