STP - Mike Meyers network+ book

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Hi,

I am studying for the network+ using Mike Meyers all in one book.

I am currently looking at the STP section (chapter 4 page 102) and I cannot figure out why figure 4-24 is a bridge loop? I cannot see a redundant connection and it looks to be the same as the one shown in Figure 4-23, minus one switch.

Can any body who has a copy of the book explain this to me please? I am not sure if I can post an image of the figure with out breaking any copy right rules.

Thanks.