Biological weathering is caused by living organisms, such as microbes, animals, and plants. Water, oxygen, and rocks are nonliving things (though water and rocks may be capable of weathering), and only plant roots fits the definition of biological weathering. So the correct answer for #1 is A.
Frost wedging occurs when the little water content in rock freezes, expanding and forcing the rock apart. Eventually, enough freeze-melt cycles causes the rock to break apart little by little. This is due to ice's density being less than that of water, meaning that it is because water expands when frozen. So the answer to #2 is A.
Answer:
Well i know nothing about this but i do know that snow and rain are both forms of water and they both can in difficult situations can be used as a source for hydration though it it is not supposed to be the first choice for hydration. obviously they are different because snow can be shaped into many things if you have patience, skill, and time, but water is a complete liquid and cannot be formed into things. As im typing im forgetting a lot so i hope this was useful and im sorry for not knowing about this stuff yet.
Explanation:
have a good day :/
The Three Gorges Dam is located along the Yangtze River.
The answer is the spring equinox
