Question

Match the columns I and II, and choose the correct combination from the options given.

	Column I		Column II
a.	Forest	1.	Terrestrial ecosystem
b.	Estuary	2.	Aquatic ecosystem
c.	Grassland	3.	Man-made ecosystem
d.	Wetland
e.	Aquarium

• A. $$\begin{array}{ccccc}a& b& c& d& e\\ 1& 2& 1& 1& 3\end{array}$$
• B. $$\begin{array}{ccccc}a& b& c& d& e\\ 1& 2& 1& 2& 3\end{array}$$
• C. $$\begin{array}{ccccc}a& b& c& d& e\\ 1& 1& 2& 2& 3\end{array}$$
• D. $$\begin{array}{ccccc}a& b& c& d& e\\ 3& 2& 1& 1& 2\end{array}$$

Answer 1

The correct option is B $$\begin{array}{ccccc}a& b& c& d& e\\ 1& 2& 1& 2& 3\end{array}$$

Forest - Terrestrial ecosystem
Forest is a land-based ecosystem that is composed of biotic communities that live on land and their physical environment. Thus it is a terrestrial ecosystem.

Estuary - Aquatic ecosystem
An estuary is a coastal body of brackish water that is partially enclosed. One or more rivers or streams flow into it and it has a free connection to the open sea.
An estuary is a water-based ecosystem in which the major abiotic component is water and the biotic community is largely composed of aquatic plants and animals. Thus it is an aquatic ecosystem.

Grassland
Grasslands are huge stretches of land in which the vegetation primarily consists of grasses. These are land-based ecosystems consisting of terrestrial plants and animals and their physical environment. Thus, grasslands are terrestrial ecosystems.

Wetland
A wetland is considered an aquatic ecosystem as in wetlands the soil is flooded by water, either seasonally or permanently and the vegetation mainly comprises aquatic plants adapted to anoxic and water-saturated soil.

Aquarium - Man-made ecosystem
An aquarium is an artificial man-made aquatic ecosystem designed to hold water, aquatic animals, and aquatic plants with artificial light sources and aeration. Thus it has all the components of a natural aquatic ecosystem in an artificial setting.

Final answer
(D) $abcde$
$12123$