What is function of noun clause in the sentence your health depends on how you take care it?

The noun clause in the sentence "Your health depends on how you take care of it" is "how you take care of it".

Here's how it functions:

* It acts as the object of the preposition "on". Prepositions need objects to complete their meaning, and in this case, the preposition "on" needs to know *what* your health depends on.

* It functions as a noun. The entire clause "how you take care of it" is a noun phrase that tells us the condition your health depends on.

Here's how the sentence works without the noun clause:

* Your health depends on something.

The noun clause "how you take care of it" fills in the gap and provides that "something."