Final answer:
The correct commandlet to use in order to find a software package in the available package sources from the PowerShell command line is Find-Package. The Find-Package commandlet allows you to search for software packages in the package sources registered on your system.
Step-by-step explanation:
The correct commandlet to use in order to find a software package in the available package sources from the PowerShell command line is Find-Package. The Find-Package commandlet allows you to search for software packages in the package sources registered on your system. You can use filters and parameters with Find-Package to narrow down your search, such as specifying a specific version or package source.