A "stimulus" is basically an event that happens in the outside environment that triggers a response. So, when you touched the dog's ear, that's a stimulus. The twitch is a response! So, A is correct. But just to be sure, let's look at the rest.
Artificial selection (B) is basically breeding: when humans breed organisms in order to obtain desired traits, like breeding dog species--this is not what our example is talking about.
Natural selection (C) is a similar process. When an organism mutates, but it actually helps it survive, it is more likely than the others to survive long enough to have babies. These babies are likely to have the helpful mutation, and so are their babies, and theirs, until a good portion of them have the mutation. This is NOT the example above!
And D, reproduction--well, let's just say it would involve a female dog and lots of babies, but that's not related to our example, so that isn't right either. The answer is A: a response to a stimulus.
Answer: A
Answer:
Population growth helps the process of development
Explanation:
<span>The answer is false. The economic cost to society of speeding- linked crashes is projected by NHTSA to be $40.4 billion per year. In 2008, speeding was a contributing factor in 31 out of a hundred of all deadly smashes, and 11,674 lives were lost in those crashes. The entire economic cost of smashes was assessed at $230.6 billion in 2000.</span>
According to the philosopher Hobbes, what humans need most would be security.
He argued that security is a concept or something which the human species needs drastically in order to be able to function properly. This of course has many different opposing views, however, it was a view of Hobbes that this was the case.
