The most abundant clean energy in the Qinghai-Tibet Plateau is () A. Wind energy B. Solar energy C. Water energy D. Biology.

The five major energy sources of the Qinghai-Tibet Plateau, namely, water energy, solar energy, combustible ice, natural gas and geothermal energy, are clean and pollution-free. The Qinghai-Tibet Plateau is known as "the closest place to the sun", with an annual sunshine time of over 3,000 hours, and is extremely rich in solar energy resources. Xizang Autonomous Region began to use solar energy decades ago. Now, all kinds of solar devices, solar cookers and solar lamps can be seen everywhere in cities and remote mountainous areas. And solar water heaters. In Tibet, solar energy is not only used for cooking and boiling water, but also for power generation, lighting and heating. It can be seen that the most abundant clean energy in Qinghai-Tibet Plateau is solar energy.

Therefore, choose: B.