Answer: It's an EXPERIMENT
Explanation: Experiment is done when we apply anything to a samples or conditions in other to study another sample or conditions.
Observation is done when, we study samples or conditions in it's natural way, without application of anything that may alter it's result.
Because the researcher has applied fertilizer to one side and did not apply to the other side, that means he has performed an experiment. Since he wasn't observing the two sample in it's natural way without any external application.
Silk Road:
The Silk Road specifically refers to the trading land routes that connects East and Southeast Asia to South Asia and Persia followed by Arabian Peninsula, East Africa and finally Southern Europe.
This network was regularly used from 130 BCE and part of that road is still in existence as a paved highway that connects Pakistan and the Uygur.
Chinese are the one who first started trading in this road and as its name indicates it is mainly used as a trade route for trading silks.
Hence this ancient road played a major role on times when it was constructed.
Crescent, half, 3/4, and full moon.
He was hoping to end the war quickly.
Explanation
The war in Europe was over but there was still conflict between America and Japan. Japan refused to surrender despite being defeated in many battles. Truman made a call to drop the atomic bombs to finally end the war.
Answer: HYBRID
Explanation: Hybrid product development is a type of product development that makes a combination of different approaches to design a hybrid approach. As it regards Software or System development A hybrid approach integrates other system development approaches like Waterfall,v-shape etc in making a new system or software.
hybrid approach puts into consideration the Top-botom and Botom-top approach to product development which makes it more adaptive and user friendly.
