Difference between conformational, constitutional, and structural isomers and the same and different molecules
I'm going to assume that you don't need an explanation for the checkboxes the same molecule and difference molecules, so that leaves the following:

The terms constitutional isomers and stereoisomers make up two broad categories of isomers (molecules with the same chemical formula).  Constitutional isomers typically have different connectivities and stereoisomers have the same connectivities but differ in spatial arrangements.

enantiomers are stereoisomers that are non-superimposeable mirror images of one another.  Your hands are (roughly) enantiomers.  both are optically active is true of enantiomers.

diastereomers also known as geometric isomers are also stereoisomers that are not mirror images of one another. cis- and trans-dichloroethene are diastereomers.

If you do a web image search of isomer flowchart you'll see a lot of informative information on isomers.  Linked below is the public domain version from Wikipedia which is an example (although not the best in my opinion.)