Elizabeth, a U. S. American student, and Ahmad, an international student from Turkey, find that although they are of different faiths, their attitudes about the role of religion in everyday life are very much alike. This realization surprised Elizabeth but illustrates , a characteristic in intercultural relationships.

"Similarity " is the right solution.

Explanation:

Many people seem to believe or think intercultural relationships become appropriate, and about one-third of Respondents claim they include ethnically diverse family and friends towards themselves.Intercultural relations are sometimes not about communicating with multiple language groups, although they can well though! Trying to communicate with anyone with a particular native tongue, with instance, presents that same difficulty.

So that Elizabeth was astonished by the realization presented and therefore illustrates similarities.

Ibelieve the answer is  battle of saratoga but i could be wrong