If your asking how kitchen tools avoid rusting the answer is to maintain them dry after use or buying stainless steel that contains chromium which helps the metal protect it from rusting
The ability of an animal to maintain a stable internal environment is called homeostasis.
The answer is: A. collecting data
During this process , researchers would use their observational skills and record every notable occurrence that happen to the variables.
The focus on this process is simply to add all relevant data without making any analyzation. That process come later on after the researchers started to change the variables in order to see whether it would create a correlation.