All the answers are correct look at a map.
4" (and any subsequent words) was ignored because we limit queries to 32 words.
Answer:
Temperature and pressure
Explanation:
mechanical weathering is the disintegration/breakdown of rocks and this mainly caused the agents of mechanical weathering which are ; water , wind and ice, and this agents of mechanical weathering achieve this due the factors Temperature and pressure.
Temperature : The continuous heating and cooling of rock surfaces cause s wear and tear on the rocks leading to mechanical weathering
pressure : Ice water found in cracks of rocks exert pressure on the rocks and this also causes the rocks to disintegrate overtime
Droughts is your answer because flooded their dam by destroying it and put malaria in the water which flooded.
They used railway roads and canal access