Answer: The keyboard that moves the cursor to the next text field is CTRL (along with the right arrow key)
As far as the other options are concerned like
Caps lock: they are used to convert the lower case letters into upper case or are used to type in upper case
Tab: it is a key that can be used to put a space that consists of 8/4 spaces that can be given by only using one key i.e. Tab
Shift: They are an alternate key to capitalize letters that are in lower case