(21) CONDUCTOR:ORCHESTRA ::
- (a) director:film
- (b) painter:canvas
- (c) teacher:classroom
- (d) author:book
(22) BEE:HIVE ::
- (a) ant:colony
- (b) bird:nest
- (c) fish:school
- (d) cow:herd
(23) PHARMACIST:MEDICATION ::
- (a) librarian:books
- (b) teacher:knowledge
- (c) chef:restaurant
- (d) banker:money
(24) KEY:LOCK ::
- (a) code:computer
- (b) battery:remote
- (c) switch:light
- (d) shovel:dirt
(25) HEART:CIRCULATION ::
- (a) lungs:respiration
- (b) brain:thinking
- (c) stomach:digestion
- (d) muscles:movement
