From what kind of cross a mule is produced?​

Mule is produced from a hybrid cross.

Explanation:

A mule is the offspring which is produced by crossing or mating of male donkey with female horse.

Where the male donkey is called Jack and female horse is called mare.

The offspring produced as a result is Mule.

The gender of Mules may be male or female but consists of 63 chromosomes.

But such produced Mules are sterile.

D

Explanation:

d. Different areas have developed different instruments to measure climate change.