What would most likely happen if the thames barrier failed?
a) the fish population would decrease.
b) london would be in danger of flooding.
c) there would not be enough drinking water.
d) ships would not be able to leave the docks.

 B)London would be in danger of flooding.

B

Explanation:

If the Thames Barrier failed, London would be in danger of flooding. Paragraph 7 explains that the barrier was built to protect central London from floodwaters.

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