Which risk increased during the Roman siege of Alesia due to concentrated catapult fire?

💡 Explanation

During the siege, concentrated catapult barrages caused cumulative masonry fatigue because repeated impacts weakened the mortar joints and stress fractured stone, leading to collapse. Therefore, defensive wall failure was a risk, rather than tunnel collapse, disease spread or grain reduction which resulted primarily from different mechanisms.

• During early steam engine development, which outcome resulted from cylinder condensation decreasing thermal efficiency?
• Which technological advancement enabled Alhazen to empirically validate his intromission theory of vision within medieval optics?
• Which soil condition primarily limited early Andean civilizations construction of vast terrace systems?
• Which long-term outcome frequently resulted from the use of chinampas without proper water management techniques?
• Which mechanism caused ancient Andean terraced agriculture to prevent catastrophic soil loss during intense rainfall?
• Which risk increases when ancient Andean terrace irrigation systems experience prolonged drought conditions?