<em>A megaphone used by a cheerleader can allow people on the opposite side of a field to hear her better because;</em>
D. Solid objects can change the direction of sound waves; megaphones allow users to determine the general direction of the sound.
<u>Determination of the general direction of the sound lessens its dispersion and thus, it reaches the observers at a higher intensity, hence it being louder.</u>
Science has shown that smoking causes cancer. which is an example of how society responded to this information
Coal is considered a non renewable source because the earth cannot replenish it.
If organisms can not adapt they become extinct.
Answer:
the hermit crab has a commensalism symbiotic relationship with sea snails – the hermit crabs uses discarded sea shells to live in, and this relationship does not affect the other organism (the snail).
Explanation:
