A particle has a particular life span of time t. if the particle moves very fast, relative to a stationary observer, the observer will observe that the life span of the particle is greater than t. If the observer moves toward the source at a speed vo, more waves are intercepted per second and the frequency received by the observer increases.
If the observer is stationary, the frequency received by the observer equals the frequency produced by the source. The measured frequency rises above the source frequency as the observer approaches the stationary source. The observed frequency is lower than the source frequency.
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A territorial animal uses body language and noise production too ward off threats too there off spring of some other form of comfort to the animal. Say the gorilla when you step into it's territory its will either reveal its self or start a whooping call. If you still don't leave they will do a quick run up to you to check if your scared or not. If you do not move they will fight you over their territory
Answer:
A
Explanation:
Answer B has nothing to do with any sort of a main idea
This lines are called latitude.
