Final answer:
Polymer mortar is used in earthquake regions due to its high tensile strength and compressive rate, which allows it to resist dynamic loads and stress fluctuations during seismic activities.
Step-by-step explanation:
The type of mortar used in earthquake regions that has a high tensile strength as well as a high compressive rate is Polymer mortar. This type of mortar includes polymers that act as bonding agents, which provide additional elasticity and strength, making it suitable for seismic activities. Compared to traditional lime or cement mortars, polymer mortar is better at resisting the dynamic loads and stress fluctuations caused by earthquakes.
It is designed to tolerate the movements without substantial cracking, thus maintaining the integrity of structures during and after seismic events.