During the Late 1800s,cattle Egrets Arrived in South America from Africa

question 7

Multiple Choice

During the late 1800s,cattle egrets arrived in South America from Africa and began to colonize.Their range has expanded dramatically over the years.Why were they able to do this?

• A)The habitats that they left in Africa were not suitable for any further colonization; thus,they were forced to emigrate.
• B)The habitats that they encountered in South America were suitable to them and unoccupied.
• C)There were abundant cattle for the birds to gather around in South America; furthermore,various animals that the egrets had lived around in Africa had become quite scarce because of over hunting and poaching,causing the birds to extend their range.
• D)The food resources in South America were far superior to those in Africa,allowing the egrets more opportunity to grow and reproduce and ultimately expand their range.

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