This question is pretty vague and confusing.
You just need to count the number of crest (high points) if waves that like pass the fixed point 1 second or some other time period. The higher the number is man, the greater the frequency is, Hope this helps!
Mass does remain constant. A is true.
Only the form changes. ( I take that means that a solid is different from a liquid) and that is also true.
Kinetic energy changes. This one is kind of iffy. that means that the temperature will change. Temperature is a measurement of KE. If the change is so much as 1 degree or 1/2 a degree or a millionth of a degree, this is true. It's not very likeable though.
The last one is false. Chemical reactions produce new things. State change only produces something going (say) from a liquid to a solid. There's nothing new being created.
Answer D
Answer:
The photosynthetic dinoflagellates called zooxanthellae have a MUTUALISTIC relationship with the corals in which they live.
Explanation:
The relationship that exist between dinoflagellates and corals is simply a symbiotic or mutualistic relationship which entails both organisms benefits from each other.
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