Question

Which words and punctuation marks correctly complete the sentences?
The highest level is different from the other levels in a crucial way. All the previous levels discuss needs that need to be__ once they are satisfied, we no longer think about them. If we feel well fed, safe, appreciated, and confident, we don’t think about those needs anymore. But on the complex level of ___a person continues to feel this need even after he or she has achieved it. This need drives us to be the most complete people we can—to be the best that we can be.