Native Americans have been hunterers and gatherers up to the period when growing crops became available to them/when they discovered growing crops is a thing that could be done. The reason for this is that when you've started growing crops, you can safely stay on one spot and have a sufficient supply of food for a longer time period - this wasn't available before. However, even with the coming of agriculture, the still hunted and gathered as it was an important aspect of their life.
Answer:
reliable, valid
Explanation:
Reliability and validity are concepts in measurement. Reliability has to do with the degree to which an instrument can produce consistent results when it is used repeatedly over time. Validity, on the other hand, indicates the extent to which the instrument measures its intended measurement. The scale can be reliable but not value as it still produces results, though inaccurate.
Sustainable development involves meeting the needs of the present without sacrificing the ability of future generations to meet their own need.
<h3>What is Sustainable development ?</h3>
Sustainable development serves as the term that refers to idea that human societies must live and meet their needs.
And this meeting of needs must be done without compromising the ability of future generations to meet their own needs.
Learn more about Sustainable development at;
brainly.com/question/2847405
true
as the consumer pays the money to buy whatever service is needed by him
plz mark brainliest