This is the 13340th most frequent Spanish word.
raciales
"Raciales" means "racial" in English, relating to race or ethnicity.
In this sentence, 'raciales' describes the type of tensions, referring to their basis in race.
Las tensiones raciales han aumentado recientemente.
Racial tensions have increased recently.
Here, 'raciales' modifies 'estudios' to specify the focus of the studies as pertaining to races.
Se llevaron a cabo estudios raciales para analizar la diversidad.
Racial studies were conducted to analyze diversity.
'Raciales' characterizes 'diferencias' by stating that the differences are related to race.