Modular blockchain
Modular blockchains are specialists that only perform one or two functions. The functions that modular blockchains can specialize in are:
Modular chains don’t sit alone, though. Multiple of them combine to perform all the tasks a monolithic chain does by itself. This combination of chains is what we call a modular stack.
For example, Celestia is a modular blockchain that specializes in providing consensus and data availability for other types of chains.