Which outcome results when freeze-thaw weakens ancient Incan walls?

💡 Explanation

Freeze-thaw cycles expand water within porous stone, causing fracturing called frost wedging. Because repeated expansion widens cracks weakening structural integrity, structural collapse possibility increases; therefore, option A is right above others because thermal changes cause the effect.

• For ancient Inca terraced agriculture practiced at high altitude, which consequence arises under conditions where internal hydrostatic pressure dramatically increases?
• Which risk increased when Roman siege engines fired heated projectiles?
• Which consequence arose when Song Dynasty iron foundry outputs outstripped coking coal sources?
• Which consequence results from thermal shock on a Byzantine mosaic?
• Which consequence resulted from Roman corvus bridges exceeding height limits?
• Which result manifested when the Anasazi used terraced farming in arid canyons?