I believe the answer is: Individualism and federal bureaucracy
Individualism becomes a threat because it make people less likely to be involved in social issues, while federal bureaucracy would strengthen the Federal government and would take away the power to determine enacted law from the people.
The answer would be c. Here
Plants that get nutrients from rocks will can cause chemical weathering. Generally there are two types of weathering processes: physical and chemical weathering and they result in the breakdown of rocks, minerals, etc. Plants contribute to both physical and chemical weathering. Plants that grow in fissures and cracks in the rocks, as they grow their roots extend. Over time, the rocks will be broken into smaller fragments. Many such plants also give off chemicals, most commonly humic acid. These acids help in the breakdown of iron and aluminum compounds in the subsurface. Plants also support microbial life forms that help in weathering of soil and minerals. All these process contribute to the weathering of rocks and minerals.
I hope i helped. Also sorry if there were any typos.
