Read each short fact about how our senses work. Choose the correct question word to complete the sentence.
 
1. Our brains can recognise familiar voices even when we cannot see the speaker. Features such as pitch, rhythm and pronunciation can help us realise is speaking.
2. Sounds often reach our two ears at slightly different times and volumes. The brain compares these differences and helps us realise a sound is coming from.
3. Our eyes compare small differences in shape, colour and position when we look at similar objects. This can help us realise object is closer to us.
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