What lesson did the Spanish explorers learn from the failure of the first missions?

What lesson did the Spanish explorers learn from the failure of the first missions? The concern that the French would settle in the area and challenge Spanish claims. The Spanish explorers established forts and missions in Texas in response to —. The influence of Spanish colonial heritage on the United States.

Explanation:

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the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.