Two trends in the evolution of early humans are… A Increasing hair and decreasing skull volume.

B Increasing arm to body ratio and decreasing height.

C Increasing skull volume and decreasing hair.

D Increasing height and stable skull volume.

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.