Hydrocarbons where carbon atoms are linked with a single bond are called alkanes.

Here's why:

* Alkanes are the simplest type of hydrocarbon.

* They have the general formula C_nH_2n+2, where 'n' represents the number of carbon atoms.

* The single bonds between carbon atoms allow for free rotation, giving alkanes a flexible structure.

Examples of alkanes include:

* Methane (CH₄)

* Ethane (C₂H₆)

* Propane (C₃H₈)

* Butane (C₄H₁₀)