Answer: Experimental
Explanation:
Experimental study is the study in which researcher has some control over the variables where he can experiment and test over the groups. Observational study provides no control to researcher .He can only observe the process.
According to the question, study conducted by farmer is experimental as farmer has the control over quantity variable of land , grouping choice of crop etc.He is dividing the land equally in four parts,sowing same crops into 4 groups in each piece depicts that he is testing or experimenting everything equally.
Answer:
<em><u> Bostwick's negligence is based on his unethical practices while trying to repair the faulty stove</u></em>. In every profession, it is expected that, there would be guiding ethical standards to follow in-order to ensure the safety of everyone.
<em>For Bostwick to use improper technique for the repair means that, he neglected the safety and ethical standards while carrying out his job.</em>
Explanation:
Answer:
D. Humankind spread to inhabit all parts of the globe.
Explanation:
Paleolithic humans were nomads, so they moved from place to place when they were running out of food. This led to a big spread of humankind from Africa to Eurasia, the Southeast region of Asia, and Australia. Afterward, they started inhabiting Europe to finally reach America from North to South.