Open the source notes , and review the notes for all three sources:
. "Should We Terraform Mars?"
. "Mars"
. "Why Mars?"
Consider and record your thoughts about these concepts:
. one common idea among the texts
• one idea from the texts that differs
how the ideas better help you understand the topic and answer the question "Should humans travel to Mars?"

answer: from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion—that we here highly resolve that these dead shall not have died in vain, that this nation under god shall have a new birth of freedom, and that government of the people

explanation:

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.