Question

as it has become increasingly clear to paleoanthropologists that human beings are the product of mosaic evolution,
they have begun to pay attention to the earliest common features that define \human nature\ in distant human ancestors
they are less willing to claim that a bundle of traits signifying \human nature\ originated at one time among our distant ancestors
they are increasingly supportive of the \man the hunter\ scenario
they are less willing to claim that either hunting or gathering was the force that drove the development of \human nature\ in our distant ancestors

Explanation:

Mosaic evolution means different traits evolve at different rates. So, paleoanthropologists would be less likely to claim a bundle of traits (signifying "human nature") all originated at once (as that would imply synchronous evolution, contrary to mosaic evolution). The "man the hunter" scenario and claims about a single force (hunting/gathering) driving "human nature" development also go against the idea of multiple, differently - paced evolutionary factors in mosaic evolution. Focusing on earliest common features is not directly related to the concept of mosaic evolution as much as the non - synchronous origin of trait bundles.

Answer:

they are less willing to claim that a bundle of traits signifying "human nature" originated at one time among our distant ancestors