Which action is the best example of a direct observation? identifying which bird was present by the tracks that it leaves in the sand at a beach reading numbers on a heat sensor to conclude that there is a deer in the night woods listening to a cricket chirp at night and counting the number of chirps per minute determining the seal population of an island by counting seals in 10 square meters of the island

the correct answer is C!

Explanation:

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.