Which of the following is an example of a marine ecosystem?

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APonds

BOpen oceans

CSprings

DSwamps

Answer:

Examples of fresh water ecosystems - Lakes, Ponds, Swamps, Pools, Springs, Streams, and Rivers
Examples of Marine ecosystems - Shallow seas and Open oceans

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Which of the following describes the environmental effects of disasters and natural hazards?

Environmental effects include the destruction of homes, buildings, lands, and surroundings.
Disasters can lead to significant losses in food supplies due to crop destruction and damage to road networks.
Potable water supply can be interrupted due to the presence of unburied human bodies and animal carcasses.
Environmental effects are limited to the immediate physical damage of structures.

What are the defining characteristics of desert ecosystems?

Annual precipitation exceeding 500 mm is a defining characteristic.
Evaporation rates are considerably lower than precipitation levels.
The defining feature is that evaporation surpasses precipitation.
A common threshold for desert classification is less than 250 mm of annual precipitation.

Regarding the irrigation techniques used in the Nile valley, which statement is accurate?

The Nile's overflow was stored in shallow basins for irrigation.
Water-lifting devices were primarily powered by wind energy.
The stored floodwater was used to cultivate crops only during the winter season.