What is ownership, borrowing, and lifetimes.

• Ownership: prevents double free, accessing memory after free and ensuring memory safety

• Borrowing: prevents aliasing and data races. ensure single writer and multiple writes.

• Lifetimes: prevents invalid or dangling references. ensures that references remain valid and dont outlive the data they point to.

• Deref:

• Drop:

• Arc:

• Mutex:

• Send:

• Sync:

• PhantomData:

• Pin:

• Future:

• Task: