Final answer:
BrF₅ is the compound with a square pyramid geometry due to its trigonal bipyramidal electron-pair geometry and one lone pair on the central bromine atom. Option number e is correct.
Step-by-step explanation:
The compound that has a square pyramid geometry is BrF₅. This molecule has a central bromine atom with five fluorine atoms around it. The geometry can be understood by considering the electron-pair geometry, which in the case of BrF₅, is trigonal bipyramidal.
With one lone pair on the bromine atom, the molecular structure becomes a square pyramid. All other options listed in the question correspond to different molecular geometries based on their respective electron-pair geometries and the presence of lone pairs.