1. Which of the following is evidence that groundwater cause erosion and deposition ?

a) the formation of meanders
b) the formation of large boulders in the desert
c) the formation of alluvial fans
d) the formation of stalagmites and stalactites in caverns <----

Actually Anonymous is right it is infact B im sorry

Yes

Right.

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To determine which of the options is evidence that groundwater causes erosion and deposition, we can analyze each option and their relationship to groundwater.

a) The formation of meanders: Meanders are curved bends in rivers or streams and are typically formed by the erosive force of flowing water. Groundwater is not directly responsible for the formation of meanders, so this option is not evidence of groundwater causing erosion and deposition.

b) The formation of large boulders in the desert: The formation of large boulders in the desert is typically a result of different geological processes such as weathering, rock slide, or glacial movement. Groundwater is not directly involved in the formation of large boulders in the desert, so this option is not evidence of groundwater causing erosion and deposition.

c) The formation of alluvial fans: Alluvial fans are fan-shaped deposits of sediment that occur where a river or stream flows out of a mountainous area onto a flatter plain. Alluvial fans are often formed by the deposition of sediment carried by flowing water, including groundwater. Therefore, the formation of alluvial fans is evidence that groundwater causes erosion and deposition.

d) The formation of stalagmites and stalactites in caverns: Stalagmites and stalactites are mineral deposits that form in caves and caverns over a long period of time. They are formed from the precipitation of dissolved minerals in groundwater that seeps through the cave ceiling and floor. Therefore, the formation of stalagmites and stalactites is evidence that groundwater causes erosion and deposition.

Based on this analysis, the correct answer is option d) the formation of stalagmites and stalactites in caverns, as it is evidence that groundwater causes erosion and deposition.