What is the difference between ESV, NIV and NKJV My daughter is In college and is wanting to buy a new Bible. She has these three options.. I would like her to have one that is easier to understand but still accurate. What are the differences and what do you recommend for her?
Without knowing more about the reasons for your daughter wanting to buy a new Bible, and why it is she has only these three options, it is impossible to make a recommendation.  However, having background information about each of these Bibles will help her to come to a decision.  Below are links to three articles, which provide a brief history as well as pros and cons on each Bible. I have partially quoted from each article:

The English Standard Version (ESV) is a revision of the 1971 edition of the Revised Standard Version. The first edition was published in 2001 by Crossway Bibles, a division of Good News Publishers. The ESV Study Bible, also published by Crossway Bibles, was published in October 2008. It uses the ESV translation and adds extensive notes and articles based on evangelical Christian scholarship. Under noted theologian J. I. Packer, who served as general editor, the translators sought and received permission from the National Council of Churches to use the 1971 edition of the RSV as the English textual basis for the ESV. Difficult passages were translated using the Masoretic Text of the Hebrew Bible, the Dead Sea Scrolls, and other original manuscripts.  Source: https://www.gotquestions.org/English-Standard-Version-ESV.html
The New International Version (NIV) committee held to certain goals for the NIV: that it be an “accurate, beautiful, clear, and dignified translation suitable for public and private reading, teaching, preaching, memorizing, and liturgical use.” The NIV is known especially as a &quot;thought for thought&quot; or “dynamic equivalence” translation rather than a “word for word” translation...  The greatest ‘con’ of the 2011 NIV is the inclusion of gender-neutral language and the necessity of interpreting rather than translating in order to present a more culturally sensitive or politically correct version.  Source: https://www.gotquestions.org/New-International-Version-NIV.html
Although the New King James Version (NKJV) uses substantially the same Hebrew and Greek texts as the original KJV, it indicates where more commonly accepted manuscripts differ. The New King James Version also uses the Textus Receptus (&quot;Received Text&quot;) for the New Testament, just as the King James Version had used. The translators have also sought to follow the principles of translation used in the original KJV, which the NKJV revisers call &quot;complete equivalence&quot; in contrast to &quot;dynamic equivalence&quot; or “thought-for-thought” used by many other modern translations, such as the New International Version.  Source: https://www.gotquestions.org/New-King-James-Version-NKJV.html

I hope this information will be helpful.