'for example' and 'such as'
Do you think that sometimes 'for example' and 'such as' are interchangeable for the same meaning? Thank you so much as usual and have a good and safe day.
1) Wild flowers such as primroses are becoming rare.
2) Wild flowers, such as primroses, are becoming rare.
3) Wild flowers, for example, primroses are becoming rare.
And if you do not mind, is there a meaning difference between #1 and #2? I think that #2 is wrong here. What do you expert think?
P.S If you do not like examples, please would you explain with your examples?
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