Living organisms have a role in weathering and erosion in the ecosystem. Which statement describes the role of bacteria and fungi?a. they hold soil in place during high windsc. they increase water access and flow and help aerate the soilb. they decompose organic matter in the soild. they grow within cracks of rocks, breaking the rock into small pieces

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

. the sierra madre fault zone of southern california

. the san andreas fault california