Answer :
The best translation in Spanish for the English sentence given is the following:
No soy tan alta como ella
Spanish grammar
In this case, the sentence chose as the correct option is the exact translation to the first sentence given.
The other sentence 'No soy menos alta que ella' means I am not less tall than her, which is the exact opposite meaning.
It is important to pay attention to key words in this type of exercises, because the difference is very small but the meaning of each sentence changes completely.
Check more information about Spanish grammar here https://brainly.com/question/5495832