Word Relationships

What type of word relationship is this:

Glove is to hand as shoe is to foot.

What type of word relationship is this:

Loss is to sadness as joke is to laughter.

What type of word relationship is this:

Alligator is to reptile as bracelet is to jewelry.

Knee is to ​ (a)   as elbow is to ​ (b)  

Injury is to ​ (a)   as wound is to ​ (b)  

Daisy is to ​ (a)   as oak is to ​ (b)  

​ (a)   is to orchestra as ​ (b)   is to class.

Exercise is to ​ (a)   as studying is to ​ (b)  

Frown is to ​ (a)   as car is to ​ (b)  

Complete this member/category word relationship:

House is to building as (a)   is to sport.