Jason studies Spanish for three years, and then switches to Pashto. When asked to remember Spanish vocabulary he can't, instead he can only remember Pashto vocabulary. This is an example of interference.

retroactive interference

Explanation:

Jason  deal and exhibit retroactive interference, retroactive interference refer to backward memory, means when person learn new things and languages he started forgetting backward information and memory and those information become long-term memory. It shows that human mind memory has limit to learn maximum afterward that limit human mind started forgetting long term memory and focus to learn short term memory.

answer; the region experienced a surplus of food;

answer; code of federal regulations;