Answer:
Zora's lemon tree produces too much fruit. She gives them away, therefore, to her friends and neighbors.
Explanation:
Out of the three sentences given in the question, the correct sentence with correct punctuation will be the second option.
The second sentence's use of the punctuation marks, the separation all makes it correct. The use of a comma before and after 'therefore' is correct, for it is the joining word or the bridging word for the sentences.
Zora's lemon tree produces too much fruit. She gives them away, therefore, to her friends and neighbors.
While in the other two sentences, we see the continuous flow of the sentence without any use of the full stop.
Sentences1 and 3 are wrong as -
Zora's lemon tree produces too much fruit. She gives them them away therefore, to her friends and neighbors.
Zora's lemon tree produces too much fruit. She gives them away, therefore to her friends and neighbors.
