Answer:trading with outside partners to bring in surplus food.
building projects ensured their power would not be challenged.
the building of a postal system to increase the economy.
irrigation systems made trade possible because of surplus crops.
Explanation:
The most important policy issue facing the united states among these are jobs and teaching, economic inequality, an aging residents with health problems, and climate change and energy needs.
<h3>What problems should be solved?</h3>
- Armed Conflict.
- Chronic Disease.
- Education.
- Infectious Disease.
- Population Growth.
- Biodiversity.
<h3>What is the most important societal problem?</h3>
Survey respondents ranked bias, prejudice and racism as the single most significant issue demanding greater action and leadership, with other top-ranking issues including climate change and cognitive health and wellbeing
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