Final answer:
The presence of water in magma generally decreases its viscosity, thereby promoting a less explosive, more fluid type of eruption, such as those seen in Hawaiian type eruptions.
Step-by-step explanation:
The introduction of water to magma can have a significant impact on its viscosity. When water is introduced, it can help to lower the melting point of the surrounding rocks and decrease the viscosity of the magma, which allows it to flow more easily. In this context, the introduction of water to magma would b.
Decrease viscosity. Decreased viscosity in magma often results in less explosive, effusive eruptions, which are characteristic of Hawaiian type eruptions mentioned as one of the options. However, the ultimate effect of water on magma can be complex and is influenced by factors such as the amount of water, the temperature of the magma, and the chemical composition of both the water and the magma.