Identify the correct stability order.

Which among the following pairs of electronic effect and its example is $NOT$ correct?

Fill in the blanks:
$(1)$ In $+E$ effect,$\pi$ electrons from a multiple bond migrate to the ........... .
$(2)$ In $-E$ effect,$\pi$ electrons from a multiple bond migrate to the ........... .
$(3)$ ........... and ........... increase stability.
$(4)$ ........... inductive effect increases the acidic strength and ........... inductive effect decreases the strength of $-COOH$.

Identify the $-I$ effect causing group from the following.

Arrange the following carbanions in decreasing order of stability $:$

The electromeric effect in organic compounds is a....