Which house most likely flooded as a result of the storm ?
a. y only
b. x and z
c. x only
d. y and z

D. look at table 1 and look at the water level then look at table 2 and it's pretty easy from there.

D. Y and Z

Explanation:

From the data given, one can easily see that the maximum elevation achieved by river is  5.2 meters. Now the house Y has the elevation of 3.5 meter and house Z has elevation of 4 meters. Around 1:00 PM, when the flood level reaches at 4.0 meters, both Y and Z houses will be flooded badly. Since, House X has an elevation of 8 meters so it is completely safe. So option b and c are excluded.

Since, elevation of river would be higher than both Y and Z, so option a is also excluded and option d is the right answer.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.