Because in a liquid they have more space to move. Imagine if you were in a big field verses a crowded little room. In a crowded room you would bump into everyone, which would slow you down.
The correct answer is B. It becomes gradually weaker
Explanation:
A stimulus refers is an object, sound, situation, etc. that causes a reaction or response, in terms of behavior or reaction, for example, in the case presented the sound of the bell paired with the food causes the dog to salivate, which is reinforced if the stimulus is presented multiple times. However, if the stimulus that leads to the response disappears the response will also disappear over time; therefore, if the bell is presented without food (stimulus) the response will become gradually weaker and therefore the dog will stop salivating.
The europeans brought infectuous diseses such as the bubonic plague, chicken pox, pneumonic plague, cholera, diphtheria, influenza, measles, scarlet fever, smallpox, typhus, tuberculosis, and whooping cough. The diseases introduced in the Americas by the Europeans were crowd diseases: that is, individuals who have once contracted the disease and survived become immune to the disease.
Answer:
extremely important that's y they made it
