46.The trunk of redwood trees is very stout and usually forms a single straight column. It is covered with a beautiful soft, spongy bark. This bark can be pretty thick, well over two feetin the more mature trees._But the main benefit is that it keeps the center of thetree intact from moderate forest fires because of its thickness. This fire resistant quality explains why the giant redwood grows to live that long.
(A)It makes redwood trees more beautiful and appealing.
(B)It prevents redwood trees from being attacked by insects.
(C)It helps redwood trees grow as fast as possible.
(D)It allows redwood trees to bear seeds.