Bird is to Fly as Fish is to ?

A. SWIM

In the series: 1, 4, 9, ?, 25, what number should replace the question mark?

A. 16

CAT is to K9 as MOUSE is to ?

B. RAT

SUN is to DAY as MOON is to ?

A. NIGHT

Tree is to Forest as Star is to ?

A. GALAXY