Which of the following is not a type of freshwater wetland?
a.
a marsh
b.
a swamp
c.
a lake
d.
a bog

c. a lake

A wetland is a region where water meets the land. They form either seasonally or permanently. They include lakes, marshes, floodplains, and rice fields. The water in the wetland can be freshwater or saline water depending upon the source which is drained in the wetland. A lake is a wetland, where large body of water surrounds the land. A lake receives water from river, surface run off or from ocean. The lake may also be formed due to flood. The lake occupies the stagnated water, without drainage to other water source. Therefore, the water in lake is polluted because it is contaminated by surface run off. Hence, it does not contain freshwater.

Explanation:

measurement of a set, accuracy is closeness of the measurements to a specific value, while precision is the closeness of the measurements to each other.

Accuracy has two definitions:

More commonly, it is a description of systematic errors, a measure of statistical bias; low accuracy causes a difference between a result and a "true" value. ISO calls this trueness.

Alternatively, ISO defines[1] accuracy as describing a combination of both types of observational error above (random and systematic), so high accuracy requires both high precision and high trueness.

Precision is a description of random errors, a measure of statistical variability.

In simpler terms, given a set of data points from repeated measurements of the same quantity, the set can be said to be accurate if their average is close to the true value of the quantity being measured, while the set can be said to be precise if the values are close to each other. In the first, more common definition of "accuracy" above, the two concepts are independent of each other, so a particular set of data can be said to be either accurate, or precise, or both, or neither.