JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <table border="1" id="engagements">
        <tr>
            <th>
                <input type="checkbox" onclick="checkAll(this)" />
            </th>
            <th>Organization</th>
            <th>Project</th>
            <th>Product</th>
            <th>Activity</th>
        </tr>
        <tr>
            <td>
                <input type="checkbox" onclick="checkAll(this)" />
            </td>
            <td>
                <select>
                    <option value = "1">One</option>/>
                     <option value = "1">two</option>/>
            </td>
            <td>
                <input type="text" />
            </td>
            <td>
                <input type="text" />
            </td>
            <td>
                <input type="text" />
            </td>
        </tr>
    </table>
    <select name="mode" id="mode">
        <option value="">Add More Rows with Same Data as Above</option>
        <option value="1">1 More</option>
        <option value="2">2 More</option>
        <option value="3">3 More</option>
        <option value="4">4 More</option>
        <option value="5">5 More</option>
    </select>
</form>

JavaScript

$("#mode").on('change', function () {
    var rows = parseInt(this.value);
    console.log(rows);
    var lastRow;
    for (var i = 0; i < rows; i++) {
        lastRow = $('#engagements tr').last().clone();
        $('#engagements tr').last().after(lastRow);
    }
});