A. Decreasing amount of energy needed to start a reaction.
I believe it is natural selection. Natural selection is when over a period of time, traits that are formed to help the organism survive, are passed to the next generation. For example, if there were two types of rabbits. One had black fur and the other was white. They both lived in the artic. The black furred rabbits are mostly eaten by predators because their black fur is easily seen against the ice and snow. Over a period of time, the black furred rabbit would die out. The next generation would mostly have white fur to help them survive.
Answer:
bones
Explanation:
other parts such as skin etc is made up of soft tissue so it decomposes easily
There is no data send a picture
A.
Explanation: Because he learned it in previous years when it was different, now it becomes hard to learn the new information.