Describe the characteristics of Sedimentary rocks, the formation of land forms found in tropical deserts, and the problems faced by people living near large rivers.

Here are the answers to the questions:

a) Characteristics of Sedimentary Rocks
Sedimentary rocks are formed from the accumulation and compaction of sediments.

• They are typically layered or stratified, showing distinct beds.
• They often contain fossils, which are preserved remains of ancient organisms.
• They are generally softer and more porous than igneous or metamorphic rocks.
• They are formed at or near the Earth's surface through processes like weathering, erosion, deposition, compaction, and cementation.

b) The formation of the landform that is found in tropical deserts.
The prominent landform in tropical deserts is the sand dune.
Sand dunes form through the process of aeolian deposition. Wind erodes and transports sand particles, which then accumulate in areas where the wind speed decreases or encounters an obstacle. Over time, these accumulations grow into distinct dune shapes, influenced by wind direction, sand supply, and vegetation.

c) The problems faced by people living near large rivers.
People living near large rivers often face several challenges:

• Flooding: Rivers can overflow their banks during heavy rainfall or snowmelt, causing widespread damage to homes, infrastructure, and agriculture.
• Erosion: The constant flow of water can erode riverbanks, leading to loss of land and instability for structures built nearby.
• Waterborne diseases: Contaminated river water can spread diseases like cholera, typhoid, and dysentery, especially in areas with poor sanitation.
• Displacement: Severe floods or erosion can force communities to relocate, disrupting livelihoods and social structures.
• Pest infestations: Rivers can provide breeding grounds for insects like mosquitoes, leading to increased incidence of diseases such as malaria.