An ammeter connected in parallel would give the current flowing through the circuit a pathway with minimal resistance, creating a very large current that could harm the ammeter

An ammeter connected in parallel would give readings of half the current flowing through the circuit because current would flow evenly between the ammeter and the circuit's regular pathway

An ammeter connected in parallel would not read any current because the current would have no driving force through the ammeter

An ammeter connected in parallel would give high readings of current because the current would be flowing through both the regular current path and the ammeter, but disproportionately through the ammeter

An ammeter connected in parallel would give very low readings of current because current would be flowing through both the regular current path and the ammeter, but disproportionately through the regular path

The wire has a slight internal resistance and caused a potential drop

Once the current is distributed across the wire, there is less charge per unit length of the circuit and so the voltage is lower

The wire is causing electrons to be lost to the air, which lowers the potential measured

The difference in potential measured is small enough to be disregarded

The wire connected to the battery must be connected to something else where this potential is being lost