Which of these themes best represents the reason the irish came to america in the late 1840s?

The best theme that represents the reason of the Irish of why they came to America in the later years of the 1840s was because of their economic and survival reasons. A potato famine in Ireland was happening and there was a need for them to migrate from Ireland to avoid starving to death. Another reason was that America offered the Irish more opportunities to have jobs.

chemicals that are toxic to plants

i dont have that book