Survey research involves - the process of selecting for study a limited number of subjects who are representative of entire groups sharing similar characteristics, called the population.

Sampling

Explanation:

Sampling is the method of selecting samples from a larger population so that we can generalize our findings back to the population from which they were selected, by analyzing the sample. The sampling technique is vital for the accuracy of research and it includes various methods including probability sampling, stratified sampling, cluster sampling, systematic sampling, etc, according to the need of the research.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.

disorders of the brain include both behavior disorders and other psychiatric illnesses. the primary difference between a behavior disorder and another type of psychiatric disorder is the presence of choice. psychiatric conditions are considered to be involuntary while in behavior disorders, choices are essential.