Drag and drop into text
From MoodleDocs
A drag and drop question type where missing words have to be dragged into gaps in a paragraph of text.
This is a question type created and maintained by the Open University.
More documentation
More http://labspace.open.ac.uk/mod/oucontent/view.php?id=470268§ion=5.4.1 documentation is available on the Open University's OpenLearn site.