None of them are grammatically correct because none of them are complete thoughts let alone sentences.
All three try to specify the particular monkey by enumerating that it can see your ears but do no more.
Take away the description of the monkeys ability to see your ears and what you’re left with is “the monkey”.
“The monkey” isn’t a sentence.
If you are the subject and what’s happening is that you’re wondering if the monkey can see your ears then the sentence you want is “I’m wondering if the monkey can see my ears.”
If, as I suspect, you’re using “the monkey whose ability to see my ears I’m wondering about” as the subject of some larger more complex and cool sentence then you gotta lay out that part before someone can give solid grammatical advice.
The safety thing is 100% true but only part of the picture.
E-bikes don’t need maximum energy density because they’re not gonna be used for long trips and are significantly lighter than cars and trucks.
China has many, many more electric vehicles than any other country and a ton of electricity production to run them. At some point it’s gonna become important to save the lithium batteries for the stuff that needs that high density power.
Maybe these better chemistries that will replace lithium are just around the corner. I certainly don’t count unhatched chickens.