Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.

Correct Answer: Option C — tropical waves

Tropical waves are defined as low-pressure disturbances that propagate westward along the Intertropical Convergence Zone (ITCZ). These troughs represent areas of atmospheric instability and are the fundamental building blocks for tropical cyclogenesis, as documented in standard meteorological texts and the American Practical Navigator (Bowditch).