4. Name the two different types of modifications that can be performed on a data source.

1. delete and edit columns.

2. Hide and show columns of data source

Explanation:

One can modify uploaded data in data source. This is called as Data Wrangling. We can modify data source by creating new columns, deleting existing columns, Hide and show columns of data source. Column editing also depends of data in the column. Modifying data sources a=can be very helpful to perform joins between data sources.