Answer:
The sentence that is false in order for evolution by natural selection to occur is:
The particular traits present in one generation have no effect on traits in the next generation.
Explanation:
The reason or this answer is that these particular traits present in the current generations are going to be inherited to the new generations and they are going to affect the survival of them. That is what happened with giraffes with large necks. If they weren't inherited in the following generations, they would have never survived.