If multiple answers are allowed, the answers would be:
A. Many people are now immunized.
B. More is known about the importance of sanitation and hygiene.
And C. Vaccines have been developed.
Hope this helps!
Economic geog.
political geog.
demography
social geog.
war geog.
agriculture geog.
settlement geog.
regional geog.
Salutations!
<span>A(n)__________ would be found at the mouth of a river where fresh and salt water meet.
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<span>A(n) estuary would be found at the mouth of a river where fresh and salt water meet. The result of fresh water mixing with the salt water is called barckish water. Estuary is where the river meets sea, and sea is where you find salty water.
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Hope I helped :D