Darwin hypothesized that new species could appear gradually through small changes in an ancestral species. which observation that he made about finches most support that hypothesis

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

i think its 100.

hope this !