INV-DOLA SLP
First the user must acquire DOLA and INV in equal value amounts
Users can then provide INV-DOLA LP on Sushiswap here
Once acquired, the SLP tokens can be supplied to Anchor to receive additional INV rewards on top of trading fees. Once enabled, the SLP asset can be used as collateral with a 70% collateral factor to borrow DOLA to earn more yield.

What Are Liquidity Pools? (from Sushiswap)

Liquidity pools are a place to pool tokens (which can be called liquidity) so that users can use them to make trades in a decentralized way. These pools are created by users and decentralized apps (or Dapps, for short) who want to profit from its usage. To pool liquidity, the amount a user supplies must be equally divided between two coins: the primary token (sometimes called the quote token) and the base token (usually ETH or a stable coin). SushiSwap's liquidity pools allow anyone to provide liquidity here. When they do so, they will receive SLP tokens (SushiSwap Liquidity Provider tokens). If a user deposits $SUSHI and $ETH into a pool, they would receive SUSHI-ETH SLP tokens. These tokens represent a proportional share of the pooled assets, allowing a user to reclaim their funds at any point. Every time another user uses the pool to trade between $SUSHI and $ETH, a 0.3% fee is taken on the trade. 0.25% of that trade goes back to the LP pool.
The value of the SLP tokens, which represent the shares of the total liquidity of each pool, is updated with each trade to add their value relative to the tokens the pool uses to trade. If previously there were 100 SLP tokens representing 100 ETH and 100 SUSHI, each token would be worth 1 ETH & 1 SUSHI (note in this example, ETH and SUSHI are the same relative value). If a user were to trade 10 ETH for 10 SUSHI in that pool, and another user were to trade 10 SUSHI for 10 ETH, then there would now be 100.025 ETH and 100.025 SUSHI. This means each LP token would be worth 1.0025 ETH and 1.00025 SUSHI now when it is withdrawn.