Read the following passages carefully and answer the questions given below them:
But Tilly Smith sensed that something was wrong. Her mind kept going back to a geography lesson she had taken in England just two weeks before she flew out to Thailand with her family. Tilly saw the sea slowly rise, and start to foam, bubble and form whirlpools. She remembered that she had seen this in class in a video of a tsunami that had hit the Hawaiian islands in 1946. Her geography teacher had shown her class the video, and told them that tsunamis can be caused by earthquakes, volcanoes and landslides.
Tilly started to scream at her family to get off the beach. “She talked about an earthquake under the sea. She got more and more hysterical,” said her mother Penny. “I didn’t know what a tsunami was. But seeing my daughter so frightened, I thought something serious must be going on.”
(1) What did Tilly recall?
(2) What are tsunamis caused by?
(3) How did Tilly react sensing earthquake under the sea?
(4) What made Tilly’s mother think seriously?
