While I was doing observation in the backyard I had recently found a small mushroom the stalk of the mushroom is very thin, is it interesting.The tahallus of the mushroom is white in colour and is slightly having heart shape

It definitely looks like some kind of marasmius.

Only Marasmius oreades is edible, and fleshier, of those I know.

Most of them generally look very much like the one you got there. A good representative is Marasmius capillaris:

https://www.google.com/search?tbm=isch&sxsrf=ALeKk03N8VOMmcPUcPsa5XQgDzLvbwg5Ag%3A1595675562082&source=hp&biw=1280&bih=856&ei=qhMcX_7LAsW6aZH9qNAL&q=marasmius+capillaris&oq=marasmius+capillaris&gs_lcp=CgNpbWcQAzICCAA6BAgjECc6BQgAELEDOgQIABAeOgYIABAIEB5QmAFYvSpgkyxoAXAAeAGAAbMCiAH_EpIBCDE0LjQuMi4xmAEAoAEBqgELZ3dzLXdpei1pbWc&sclient=img&ved=0ahUKEwj-yLXYoujqAhVFXRoKHZE-CroQ4dUDCAY&uact=5

Most of them also grow on dead leaves.

I'd forgotten most of what I used to know about fungi. I had to look it up and bring back memories. Thank you for bringing this up. +1