You are given a sentence and your task is to generate another sentence that supports the given input.

[EX Q]: The life cycle of all plants is complex because it is characterized by alternation of generations.
[EX A]: The life cycle of plants is so complex because of the alternation of generation.

[EX Q]: The constriction of the smooth muscle surrounding the bronchioles and the accumulation of mucus cause periods of airway obstruction and subsequent difficulty in moving air in and (to a greater degree) out of the lungs.
[EX A]: Smooth muscle regulates air flow in lungs.

[EX Q]: An electrical circuit is a network consisting of a closed loop, giving a return path for the current.
[EX A]:
Because charges must have an unbroken path to follow, electric current cannot flow through a material unless it forms a closed loop.

