Question

what is involved in weathering?
volcanoes
water
mountain building
seafloor spreading

Explanation:

Weathering is the process of breaking down rocks. Water can cause physical (e.g., freeze - thaw cycles) and chemical (e.g., dissolution) weathering. Volcanoes are related to igneous rock formation and tectonic activity. Mountain building is part of tectonic processes. Seafloor spreading is a tectonic process at mid - ocean ridges.

Answer:

water