47. Why did early humans use different materials to build shelters?
(A) They wanted their homes to look unique with local styles for tourism purposes.
(B) They experimented with a variety of building techniques for further improvement.
(C) They changed the materials for their houses to adapt to seasonal climate changes.
(D) They selected materials based on what was available in their nearby living areas.
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統計: A(2), B(14), C(25), D(107), E(0) #3426256
統計: A(2), B(14), C(25), D(107), E(0) #3426256