Answer:
Sea snakes have flattened tails for swimming, allowing them to swim faster than if they had the tail of a regular snake. The flat shape of the tail reduces drag, as well as providing a larger surface to push the water with. However, this makes moving on land difficult. They also have valves over their nostrils that close underwater. This prevents water from entering their nose as they swim. Sea snakes have very strong venom that they use to kill their prey. They also produce an enzyme that starts digesting the animal as soon as it takes the first bite. Their diet consists of mostly fish, crustaceans, and eggs. The venom and enzyme results in little room for their prey to escape, making it easier for the sea snake to sustain itself.
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Answer:
I am not sure what this excerpt is about but the author could be using this to show that parents do not understand the child. The parents "grew up in another century" telling that they are older, they are not growing up in this time, meaning that they may not understand the child, or understand if/what he is trying to talk to them.
Explanation:
The Aztec skill at engineering was demonstrated after about 1300 by the establishment of Tenochtitlan or the precursor to Mexico City built on an island on the west side of Lake Texcoco. Causeways were constructed to the island with bridges that could be opened to prevent attack by enemies. Also, aqueducts were built to bring freshwater to the city and levees were built to separate brackish water from fresh, spring water.
