Answer:
B. Small changes add up over time
Explanation:
Evolution is a pretty slow process. Â Each successful member of a new generation receives small changes in their DNA that helped them to survive, whether it's an existing trait that happened to be more helpful or a mutation. Â Over time, these helpful traits gradually add up. Â Eventually, the original species has been completely replaced by a new, improved version, that can look significantly (take horses for example, the very first horses were about the size of rabbits and had individual toes instead of hooves. Â Over time, more beneficial traits added up, and the result is the horse we know today.) Â While the traits of the original species might have been the most beneficial to them, as environments and other factors change, the species must change with it to survive. Â You could compare this to computers. Â The update you downloaded today might be the best thing to protect your computer now, but that same update won't be nearly as effective a year from now. Â
I hope this helps!
