Read the following passage and determine the text structure. The large African Bullfrog, like all amphibians, relies
heavily on water. Living in the dry region of southern Africa
presents a challenge. When the ground dries out, the
African Bullfrog must respond. It buries itself underground
and forms a cocoon from shed layers of skin and soil. The
frog "sleeps" inside the cocoon- surviving on water stored
in its bladder. Interestingly, the African Bullfrog eats his
cocoon when rainy weather returns. As a result, when the
water returns, the African Bullfrog is able to continue an
active lifestyle.