They help different things. Bees will help the local flowers and plants, solar panels will cut carbon emissions. But boosting plants doesn’t cut carbon emissions since the carbon isn’t sequestered, it’ll go back to the atmosphere once the plant decomposes.

So if you like the look of flowers or want honey, go with bees. If you want to lower carbon emissions, go solar.

As for Allen life coming under it’s own power from Mars, I’d put that extremely close to zero. More likely would be something from Europa or outside the solar system, but that’s still pretty unlikely.

I’d put the chances of Mars sample return going off in the next couple decades at about 70%.

https://wikipedia.org/wiki/Mars_sample-return_mission https://science.nasa.gov/mission/mars-sample-return