User:Shadow VS light

COME ON DO THE RIDDLES THAT'S FILLED WITH GRIDDLES:
what has four legs,but can't walk? .............. A TABLE

poor people have it,rich people need it,if you eat it you die.what is it?............NOTHING

The more you take,the more you leave behind,what am I?..........foot steps

what is full of holes,but can still hold allot of water?........a sponge

If you have me,you want to share me,if you share me,you haven't got me,what am I?............a secret

An old man wanted to leave all of his money to one of his three sons,but he didn't know which one he should give it to. he gave each one of them a few coins and told them to buy something that would be able to fill their living room ,the first man bought straw,but there was not enough to fill the room,the second bought some sticks,but they  still did not  fill the room.the third man bought two things that filled the room,so he obtained his father's fortune. what were the two things that the man bought?...........The wise son bought a candle and a box of matches.after lighting the candle,the light filled the entire room.