How to setup ReactJs, NodeJs, Redis application on AWS

I am newbie in AWS and totally confused about the deploy. here i have

React for front-end , Nodejs for API, Mongodb for database and redis for session store.

1. Can i use 1 EC2 for every service ? or
2. Divide every service as different EC2
3. Can i use Elastic Beanstalk Environment?

Which is better option for scaling and update without downtime in future ?