Which address can used to summarize networks 172.16.0.024 through 172.16.7.024?

The address that can be used to summarize the networks 172.16.0.0/24 through 172.16.7.0/24 is 172.16.0.0/21. This summarization works because the first 21 bits of the addresses are the same, allowing for the aggregation of the four contiguous /24 networks into a single /21 network.