The IUCN Red List provides information on the conservation status of different species. Match the species to their status in the table below.
\[\begin{array}{|c|c|} \hline \textbf{Species} & \textbf{Status} \\ \hline \text{Tiger} & \text{Near threatened (NT)} \\ \hline \text{Great Indian Bustard} & \text{Extinct (EX)} \\ \hline \text{Passenger Pigeon} & \text{Critically endangered (CR)} \\ \hline \text{Blackbuck} & \text{Endangered (EN)} \\ \hline \end{array}\]
An ornamental shrub species was brought from Japan in the early 1800s to India, where it was planted frequently in gardens and parks. The species persisted for many decades without spreading, and then began to spread invasively fifty years ago. Which one or more of the following processes could have led to it becoming invasive?
Which one or more of the following is/are greenhouse gas(es)?