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Arrange the sentences A, B, C and D to form a logical sequence between sentences 1 and 6.

  1. Picture a termite colony, occupying a tall mud hump on an African plain.
    1. Hungry predators often invade the colony and unsettle the balance.
    2. The colony flourishes only if the proportion of soldiers to workers remains roughly the same,
    3. But its fortunes are presently restored, because the immobile queen, walled in well below the
    4. The hump is alive with worker termites and soldier termites going about their distinct kinds of
  2. How can we account for a mysterious ability to respond like this to events on the distant surface?
    1. BADC
    2. DBAC
    3. ADCB
    4. BDCA

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