The correct answer is option 2 - Peru. El Nino is a climate pattern that occurs in the Pacific Ocean and is associated with the warming of sea surface temperatures. During an El Nino event, the normally cold waters along the coast of Peru and Ecuador become unusually warm.

Option 1 - Brazil is not correct. Although Brazil is located along the coast of South America, it is not directly affected by the El Nino current. The warming of sea surface temperatures associated with El Nino primarily occurs in the eastern Pacific, closer to Peru.

Option 3 - Alaska is also not correct. Alaska is located in the northern part of North America and is far from the area where the El Nino current occurs. The impact of El Nino on Alaska`s climate is minimal.

Option 4 - Western Australia is also not correct. While Western Australia does experience some climate variability, it is not directly influenced by the El Nino current. The effects of El Nino are more pronounced in the Pacific region.

Therefore, the correct answer is option 2 - Peru.