It has No importance

No

It should only be placed here, because this way the circular amplification is high

Yes

With the difference between the outgoing and incoming signal

With the reciprocal of the gain 

By the reciprocal of the transfer of the feedback network

With the reciprocal of loop gain

By the square of the quotient of the outgoing and incoming signal

Due to saturation of the output transistors

Because of the final output current level

Due to the limited output current or voltage

Because of the power supply voltage level

With a voltage generator connected to the output

By grounding of the non-inverting input

With a negative feedback coupled between the non-inverting input and ground

No negative impact: no compensation

Due to the reduction of the arrow-loop voltage gain

Due to the AC coupling of the included transistors signal

Due to the internal R and C elements

Due to the poles of the transfer function

with a voltage generator connected between the two inputs

with a voltage generator connected in series with the positive input

with a voltage generator connected between the positive input and ground

with a voltage generator connected in series with the negative input