From section D, part iii: 'I love watching x movies. The movies are good sources of x entertainment.' The first blank is a general statement, so no article. The second 'movies' refers to movies in general (which were just mentioned), so 'the'. 'Entertainment' is a general, uncountable concept, so no article.
Class 6 › English Grammar and Composition › Chapter 3: Articles: a, an, the › Topic: Introduction to articles: a, an, the
Aligned to the NCTB national curriculum.