Steel Defenders are "biological" Constructs?

[Cheesegear]

I'm AFB right now, but if memory serves, sleeping and eating and breathing are specifically written as requirements for LIVING creatures. That would exclude undead and constructs in most circumstances.

Modrons have to eat, drink, breathe and sleep.
Modrons are Constructs.

...Are Modrons alive?

Do Modrons Dream of Lawful Sheep?