Final answer:
In chemistry, "less branched" means a more linear structure. Branched molecules tend to have different physical properties and reactivity compared to linear molecules.
Step-by-step explanation:
In chemistry, "less branched" refers to a molecule with a more linear structure. In contrast, a more branched molecule would have multiple branches or side chains coming off its main carbon chain. The presence of branches in a molecule can affect its physical properties and reactivity.
For example, benzene is a more stable and less reactive compound than straight-chain hexenes because it has a planar structure with delocalized electrons. Straight-chain hexenes, on the other hand, have a more linear structure and tend to be less stable and more reactive.
Therefore, the correct answer to the question is a) More linear structure.