The correct answer is $\boxed{\text{A}}$. Ethane, methane, and propene are all alkanes, which are hydrocarbons that contain only carbon and hydrogen atoms and are saturated, meaning that they have all of their carbon atoms bonded to the maximum number of hydrogen atoms possible.
Methane is the simplest alkane, with the chemical formula $CH_4$. It is a colorless, odorless gas that is the main component of natural gas. Ethane is the second simplest alkane, with the chemical formula $C_2H_6$. It is a colorless, flammable gas that is used as a fuel and in the production of other chemicals. Propene is the third simplest alkane, with the chemical formula $C_3H_6$. It is a colorless, flammable gas that is used as a fuel and in the production of other chemicals.
The other options are not homogeneous categories because they contain different types of hydrocarbons. Option B contains methane, which is an alkane, and ethane, which is an alkene. Option C contains ethyne, which is an alkyne, propyne, which is an alkene, and butane, which is an alkane. Option D contains ethyne, propyne, and butyne, which are all alkynes.