We can terminate the iteration algorithm

when there is more flow augn

$[$Choose$]$

when there is more flow augmenting path can be found by adding additional flow to the path from source to sink$.$

when we find a path from the source to sink where some additional flow can be sent.

when there is no flow augmenting path can be found by adding additional flow to the path from source to sink$.$

Question $4$

when we find a path from the sink to source where some additional flow can be sent.