What type of main change occurs in physical weathering?

Correct answer: Change only in size and pieces

Direct answer: Option A, change only in size and pieces. Physical weathering is mechanical disintegration: a large rock is broken into smaller fragments without a major change in its chemical composition. Temperature expansion and contraction, pressure release, salt growth and frost action can produce cracks and pieces. Option A is correct because the main change is physical size, shape or number of fragments. Option B is wrong because complete chemical change belongs to chemical weathering, such as oxidation or carbonation. Option C is wrong because fossil formation is a biological and geological preservation process, not the defining result of physical weathering. Option D is wrong because new layered soil does not form immediately and soil formation involves weathering, organisms, organic matter, water and time. Physical weathering may help soil formation later, but it does not itself mean instant layered soil. Memory cue: physical weathering changes form, not chemical identity.