This is the 3874th most frequent Catalan word.
bàsic
Basic.
The word "bàsic" is used here as an adjective meaning fundamental or essential, indicating the importance of proper nutrition for health.
La nutrició adequada és un aspecte bàsic de la salut.
Proper nutrition is a basic aspect of health.
"Bàsiques" modifies "habilitats" to describe foundational or fundamental skills that serve as prerequisites for advanced understanding.
Les habilitats bàsiques en matemàtiques són necessàries per a entendre conceptes més avançats.
Basic mathematical skills are necessary to understand more advanced concepts.
Here, "bàsic" is used to characterize the manual as simple and introductory, suitable for someone starting to learn.