It depends on how old it is if it is very young and doesn't have a mom then it needs a substitute for the milk. You will need to feed the piglet with a bottle. It will also need to stay warm.
They need to stay alive to support the organism
Oxygen is needed to stay alive. Without it you suffocate.
The four thing you need to stay alive are: Oxygen, water, Food, and Air
The reason is because piglets mother usually leaves her calves. Piglets need to be very warm, and that is why many times they need to be fed by humans.
Enviorment
To stay alive
they need a lot of energy
breath and crap like that
Water to swim in
to stay alive
The Romans needed water, food and shelter to stay alive just like everyone else.
It does need resources.