Can I specify multiple parallel approvers when configuring my business process flow?

Yes. You can change the default template to design either a parallel or serial business process flow and save it as a new project. A parallel approval is where any one approval is enough from the approvers specified in the process flow.

A serial approval is where all the approvals are required sequentially from the specified approvers. See Set Up Parallel Approval for more information about creating an approval workflow that requires approval from a group of people, in any order.