Final answer:
La Niña represents the cool phase of the ENSO cycle with lower-than-average sea surface temperatures in the tropical Pacific, making it the opposite of El Niño.
Step-by-step explanation:
La Niña is the cool phase of the El Niño Southern Oscillation (ENSO), which features lower-than-average sea surface temperatures (SST) in the central and eastern tropical Pacific ocean. This phenomenon typically brings higher air pressure to the eastern Pacific and lower air pressure to the western Pacific. Hence, the most accurate statement regarding La Niña is that it is the opposite of El Niño, as they are two opposing phases of the ENSO cycle affecting global climate patterns.