Answer the following question given this paragraph: 

Felsic lavas are more viscous and erupt explosively or do not erupt. Mafic lavas are less viscous and erupt effusively.


Q: Which type of lava lavas are less viscous and erupt effusively?

 Choices:

- Ultramafic lava

- Intermediate lava

- Felsic lava

- mafic

A:
mafic
