Removing rows from a data frame doesn't actually remove them?

The problem that I am encountering is that the reduction in observation numbers change correctly for the data frame in the global environment. However, the actual number of observation in the df doesn't change. What to do? The first picture showed 3130 in the global environment, but the second picture of the same df when opened, says 3134. I can only upload one picture.
Screen Shot 2022-03-17 at 8.00.12 PM

Please show the code you used to eliminate the rows. Reporting the output of nrow() run on the data frame before and after the process would also be helpful.

figured out the problem. thanks for the hint.

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