The correct answer is: a) Rivers and streams.
Fishing in Mizoram is primarily practiced in rivers and streams. The state has a number of rivers and streams, including the Tlawng, the Tuirial, and the Khawthlang. These rivers and streams are home to a variety of fish species, including carp, catfish, and mahseer. Fishing is a popular activity in Mizoram, and it is a source of food and income for many people in the state.
Option b) is incorrect because lakes and reservoirs are not as common in Mizoram as rivers and streams. Option c) is incorrect because fish ponds are not a traditional form of fishing in Mizoram. Option d) is incorrect because the ocean is not a major source of fish in Mizoram.