Выполним задание.
<table border="1" style="border-collapse: collapse; width: 100%; table-layout: fixed;">
<thead>
<tr>
<th style="width: 25%; padding: 8px; text-align: center; border: 1px solid black; word-wrap: break-word;">y + -ies</th>
<th style="width: 25%; padding: 8px; text-align: center; border: 1px solid black; word-wrap: break-word;">+ -es</th>
<th style="width: 25%; padding: 8px; text-align: center; border: 1px solid black; word-wrap: break-word;">f + -ves</th>
<th style="width: 25%; padding: 8px; text-align: center; border: 1px solid black; word-wrap: break-word;">irregular</th>
</tr>
</thead>
<tbody>
<tr>
<td style="padding: 8px; text-align: left; border: 1px solid black; word-wrap: break-word;">babies<br>cherries<br>strawberries</td>
<td style="padding: 8px; text-align: left; border: 1px solid black; word-wrap: break-word;">tomatoes<br>potatoes<br>peaches</td>
<td style="padding: 8px; text-align: left; border: 1px solid black; word-wrap: break-word;">wolves<br>leaves<br>thieves</td>
<td style="padding: 8px; text-align: left; border: 1px solid black; word-wrap: break-word;">people<br>sheep<br>mice<br>feet<br>teeth</td>
</tr>
</tbody>
</table>
Ответ: смотри таблицу выше.