How to earn 1 Ethereum for free?

Could you please elaborate on the methods to acquire 1 Ethereum without any financial investment? I'm particularly interested in understanding if there are any legitimate ways to do so. Are there any online platforms or communities that offer such opportunities? Additionally, are there any tasks or challenges that reward Ethereum as a prize? I'm also curious if mining Ethereum is a feasible option, even if it requires significant computational power. Finally, are there any other innovative strategies or unconventional methods that you could suggest for earning Ethereum without spending money?