Answer:
Karma is a Sanskrit word which means "action". It refers to the principle of cause and effect, according to which our experience now is the result of previous actions and all our current actions are the cause of our future existence. Positive actions lead to happiness and negative actions lead to suffering.
The word "Dharma" has many meanings, including "objects of knowledge" and "the path", but most commonly Dharma refers to the teachings of the Buddha.