Step 4: Create a multimedia presentation. a) Using your model, create the following scenarios. i. Night time, the Americas ii. First quarter moon iii. Lunar eclipse iv. Solar eclipse b) Take a digital photograph or a video of each of the above scenarios. Label each photo or video, using the descriptions above. c) Set the images and videos in a multimedia presentation, and write a brief description in the presentation of what is happening in each picture.

rocks and weathering-matching

the answer would be d : p

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.