Nowadays conversation with Heidi dominated with Why ?

H: Mommy Why I see lots of leaves on the ground?
M: because they are old and dried Heidi , once old it will drop off from the tree,.you can see that it's colors are brown and dried.
H: Are they die? Why ?
M: All the living things will die someday Heidi, people will also the same, once they getting older and older and weaker someday they will leave also .
H: Mommy , Is Ama Old?
M: Yes , she is aged already but she still not that old Heidi ...nothing to worry .

After a while..

H: Mommy , Why I can see the green leaves on the ground too??
M: ( ???) ..Ohh .. that one..Yes Heidi sometimes Young one can also gone.. maybe somebody pluck them from the tree and so on...