Lava tubes would be more likely to be form at a shield volcano like Kilauea than at a composite volcano like Mount St. Helens.

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Shield volcanoes have more fluid lava that can flow over longer distances and create extensive lava tubes, while composite volcanoes have more explosive eruptions that create steep slopes and often destroy any potential lava tubes. Kilauea is a shield volcano known for its extensive lava tube system, while Mount St. Helens is a composite volcano that has not been observed to have significant lava tubes.

Lava Tubes Would Be More Likely to Be Form at a Shield