The most relevant hazards that climate change poses for Southeast Asia include rising sea levels and more intense typhoons.
Climate change is expected to lead to higher sea levels due to the melting of polar ice and thermal expansion of seawater, which can inundate coastal areas and exacerbate flooding. Additionally, warmer ocean temperatures are linked to an increase in the intensity and frequency of tropical storms and typhoons, which can cause significant destruction and loss of life.
The other options, such as increased tectonic activity and volcanic eruptions, more severe winter weather, and overcrowding in coastal cities, are either not directly related to climate change or are less relevant in the context of the specific hazards faced by Southeast Asia.