which of the following resources have been the main contributors to Russia wealth in recent years

The main contributors to Russia's wealth in recent years are:

1. Oil and Gas: Russia is one of the world's largest producers and exporters of oil and gas. The country is home to vast reserves of oil and natural gas, and their production and export have been a significant source of revenue for Russia.

2. Metals and Minerals: Russia is rich in various metals and minerals, including nickel, palladium, platinum, gold, coal, and iron ore. The mining and export of these resources contribute substantially to the country's wealth.

3. Arms Exports: Russia is one of the largest arms exporters globally. The country sells a wide range of military equipment to various countries around the world, which significantly contributes to its economy.

4. Agriculture: Russia has vast arable land, and agricultural products such as wheat, barley, corn, and sunflower seeds are important contributors to the country's economy. Russia has emerged as one of the world's leading exporters of wheat.

5. IT and Technology: Russia has a thriving information technology (IT) and technology sector. Companies specializing in software development, cybersecurity, and internet services have been successful, contributing to economic growth.

It is important to note that the contribution of these resources to Russia's wealth may vary from year to year due to changing global market conditions, geopolitical factors, and domestic policies.