To separate sand from salt and pebbles, use a sieve to filter out the larger pebbles first, then add water to dissolve the salt and separate it from the sand through filtration.
To separate salt from sand and pebbles, dissolve the salt in water and then evaporate the water to obtain the salt crystals, leaving the sand and pebbles behind.
To separate pebbles from sand and salt, use a sieve or filtration to separate the larger pebbles from the sand and salt mixture.