early urban centres

The governing concept is the relationship between urban layout and the surrounding landscape. Gates oriented toward different resource zones could connect the settlement with distinct routes, production areas, water sources, or exchange corridors. This supports option A, while not proving that every gate had only one purpose. Options B, C, and D ignore the meaningful relationship between direction, access, and the external economy of the settlement.

The governing concept is the difference between production evidence and consumption evidence. A manufacturing centre should usually leave raw material, tools, unfinished pieces, or production waste. Their absence means local manufacture cannot be established, while finished beads could have arrived through exchange and then been used at the site. B is therefore the most cautious conclusion.

Standardised brick ratios are material evidence of shared technical conventions: builders likely followed agreed measurements or established construction traditions. This may indicate coordination and cultural interaction, but it does not prove that one person built every structure, that all cities were constructed simultaneously, or that political authority was completely unified. Option A is therefore the strongest conclusion because it stays close to what the measured bricks actually demonstrate.

The governing concept is the interpretation of repeated construction and repair as evidence of continuity. Repairs indicate that the drains remained useful long enough to require attention, and they imply organised labour, resources, or a maintenance practice. Option A is correct, although repairs alone cannot prove the exact administrative structure. B, C, and D conflict with the physical evidence and the practical purpose of drainage systems.

The governing concept is stratigraphic control and site formation. Erosion, ploughing, construction and later human activity can bring artefacts from buried layers to the surface or mix objects from different periods. Consequently, a surface collection may show that several occupations existed, but it cannot automatically establish a secure sequence. Excavation and carefully recorded layers provide stronger chronological control; survey remains useful but must be interpreted cautiously.