Answer:
identify the variables
Explanation:
control:type of lemon used
dependent:whether apple slice turns brown at pH>2
independent:pH value
It is the serous membrane
Plate boundary is the type of boundary which occurs when plates slide against each other as seen on the San Andreas fault in which many earthquakes are known to occur.
<h3>What is an Earthquake?</h3>
This is characterized by the ground shaking as a result of movement in the Earth crust.
Plate boundary is responsible for Earthquakes on San Andreas fault thereby making it the most appropriate choice.
Read more about Plate boundary here brainly.com/question/21668651
They would be the primary producers. otherwise known as an autotroph. (makes their own food)
