Mushroom.

Mushroom.

Why?

A carrot

The match.

Your echo

A quarter and a dime. One coin is not a dime, but the other one is.

The widow.

Sixty

Second word: Rhymes with the first word.

Together: a travel companion.

Backpack.

He played the piano until he found the right key.

What is the probability that their other child is also a girl?

The probability is 1/3 (about 33%).

Carpet 'Car' and 'pet'.