What is 'option expiring without any value' means?

#1
I was reading about options and many times it was said that option buyers were losers because there is more than 70% chance that an option will expire without any value. What is that even mean?

Lets take two long call options with strike 110 and 90. If the current spot sprice is 100 then which of the two options (110,90) has a value and which doesn't?
 

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