Alex had sleep problems in early childhood which a study has shown could lead to attention problems up into early adolescents

The statement mentioned above can be categorized as "True".

Sleep problems do have a connection with less focus or less attention problems. Researchers are finding new ways for the patients to improve their sleep cycle to avoid such issues, better sleep measurement includes light therapy and better bedtime routines etc.

answer; i believe the best and correct answer is stronger bonds between the nations of africa;

answer: musical connotation

leonard b. meyer (1918-2007) was an american composer, author and philosopher. his work emotion and meaning in music is perhaps the first major treatise on music. it is a philosophical and psychological work, greatly influenced by koffka (one of the major proponents of gestalt psychology). his work deals with the problem of musical meaning and musical communication.