0. There is no staking locktime.

APY in staking pool B is calculated as the number of stakers in that pool at the moment of claiming your rewards.

You first need to approve the contract to take your tokens, then send them. This is a very usual practice.

It is not. Once transaction is done, you can check gas fee truely cost less.

Great question! You should check how many stakers are in pool B. Pool A %APY is fixed and Pool B %APY is variable

We only recommend farming to advanced users. If you are not familiar with impermanent loss, then we do not advise you to start farming, and it would be better to stake your tokens.