Within Roman fortifications, which risk increases when timber support structures in earthen ramparts experience prolonged wet conditions?

💡 Explanation

When timber in earthen ramparts is persistently wet, anaerobic decay occurs because microorganisms thrive, breaking down the wood's cellulose and lignin, resulting in structural weakening. Therefore structural instability results, rather than cracking, collapse, or toppling, which are influenced by different environmental factors and construction techniques.

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