Answer:
Reading the boxes left to right, top to bottom.
Yo nado.
Nosotros nadamos.
Tu nadas.
Vosotros nadias.
El/ella nada.
Ellos/ellas nadan.
Explanation:
You just have to take off the last two letters, ranging from -ar -er -ir. In this specific question though, you're taking off -ar from the end and changing it to the correct ending.
See the photo attachment for help.
