Answer:
The economists typically receive information premised upon the information gathered during controlled studies. A further explanation is provided below.
Explanation:
- The investigators typically add particular manipulation throughout the observational investigation and analyze the consequences.
- The survey was performed here because the investigators simply would be required to examine the influence of fertilizer on the development of plants. Each assistance must be applied.
High density Nebula, And condenses into a huge globule of gas and dust and contracts under its own gravity
Answer:
Explanation: Lakes support many varieties of organisms, including
Plankton.
in shallow, open water and
plants,
in shallow water near shore.
Wetlands.