The chances are probably extremely small that sentient, tool-using life would arise again. If it did, the human form seems like a good basic model - upright stance, opposable thumbs, big brain.

If one believes that humanity came about as a product of random mutation and evolution, it is highly improbable that life would take exactly the same path, if it even took hold at all. If one believes in the Christian God—and we assume that the reason for the destruction was the reason attributed to Mother Nature—then yes, humans would walk the Earth again. We are created in His image, so while there might be some minor differences, the basic pattern would be the same.

Life on the earth takes many forms and humans are merely one, although the dominant one - at the moment anyway. Dinosaurs and other creatures once existed and are now extinct. I personally do not believe that humans would exist again.

Cockroaches will be the next dominant species.

If one trusts and prays to God, we humans can walk on Earth again. If we didn't, apes would be the next successors after us since we are related to the ape family. I think God knows when the Earth can start its life again if we pray everyday. Don't worry about it, enjoy your life.

Most unlikely. If we were different, then humans wouldn't be humans.

LIKELY rules for a technological species (using tools to make tools) these rules are assuming that a an endoskeleton is a requirement and that no endoskeleton species has more than 4 skeletal limbs + a tail. I may be wrong, anyone ever see a vertibrates with more than 4 skeletal limbs? (elephants stunk is not skeletal) inteligence, most likely a predator, wether it be carnevorous or omnivorous. this is not only because predators need intelligence to catch dinner, but because animal fats help develop brain matter. focus, frontal facing eyes, again probably a predator. dexderity, the number of fingers and type of skin may varry (soft nonscaly being the best), but atleast 1 opposable digit required and a flattened nail would be advantageous. also being bipedal frees up the front limbs to be highly dexterous. education, they must have intense social learning interaction with older of the species otherwise such the ability to learn would not help the species survive. a different tech species, may be smaller, larger, more agile or brutish, may even have a tail... but it is probably a requirement that it be a bipedal warmblood predator. I would say a new tech species emerging would come from one of these groups in order of most likely to least likely. primates, Mustelidae (otters, weasels), rodents, marsupials, pinipeds (seals).

Seems likely