题目选项分析

The most favorable environment for the growth of lichen, rather than being the fertile, moist soil of forest floors, would be instead the hard, sterile surfaces of rocks and tiles, which provide a stable and durable substrate on which the organisms can develop and mature.

The most favorable environment for the growth of lichen, rather than being the fertile, moist soil of forest floors, would be instead the hard, sterile surfaces of rocks and tiles, which provide a stable and durable substrate on which the organisms can develop and mature.