For an example transaction:
https://www.blockchain.com/btc/tx/71df79fe8f379134adf95d44bcf451391726bd5d211a26b7fa90be83585adb4c

Firstly, to confirm, is 'input' the sender/spender and 'output' the receiver of the bitcoins?

Is the link above ONE transaction, i.e. when a person pays x BTCs from his wallet to another wallet? If so, why are there multiple ins and outs?

Is the 'hash' (also in the URL) basically the 'transaction reference (or number)' so to speak?

Is the fee (0.00105 BTC in the example) always paid by and deducted from the sender?

Thanks in advance..