Question

many houses are made from wood. wood comes from trees. first, trees are cut down and the bark is taken off. then the trees are cut into pieces of wood. the wood can then be used to build houses. when are trees cut into pieces of wood? a. when they are cut down b. after the bark is taken off them c. after they are used to build houses

Explanation:

The text describes the sequence: trees are cut down → bark is taken off → trees are cut into wood pieces. So the step of cutting trees into wood pieces happens after the bark is removed.

Answer:

B. after the bark is taken off them