3C Answers:

1. Melodic - at the end of the first bar it went further down to an A instead of a D.

2. Rhythmic - The first 2 notes were changed from an even rhythm to a dotted one.

3. Rhythmic - At the end a dotted rhythmic was added on the penultimate beat.

4. Melodic - The second note went up to a B in the changed version  instead of down the scale.

5. Melodic - About two thirds of the way through the dotted rhythm went up higher to an E flat instead of a C.

6. Rhythmic - The second beat was changed to a dotted rhythm.

7. Melodic - In the middle of the phrase there was a higher note (a C) which had previously been an A.

8. Rhythmic - A dotted rhythm was added at the end of the phrase the second time through.