What type of rock forms when heat and pressure change the structure, texture, or composition of sedimentary rock?

How do oceanographers measure the salinity of ocean water?

The declining axolotl population in mexico city is an example of in overcrowded cities. a. the surpassing of support capacity b. changes to natural environments and native species c. the lack of safe homes and tenured spaces d. the effects of a growing urban heat island

What are the answers for the following questions?