relatively fluid and low viscosity highly viscous and relatively cool mix of hot gas and rock shards mainly water vapor and large boulders
I gave my students this multiple choice question: Hawaii is composed mainly of volcanoes with gentle slopes and large surface areas. Which characteristics best describe the lava these volcanoes have released?

Only one answer is correct among these 4 choices:
- relatively fluid and low viscosity
- highly viscous and relatively cool
- mix of hot gas and rock shards
- mainly water vapor and large boulders

Could you tell me which one is correct?

relatively fluid and low viscosity