Question 4 (a) Outline three negative effects of computer use on the environment. 1. E-waste accumulation – Discarded computers and accessories contribute to electronic waste, which is difficult to dispose of safely. 2. Energy consumption – Computers consume a lot of electricity, contributing to greenhouse gas emissions from power plants. 3. Resource depletion – Manufacturing computers requires raw materials like rare earth metals, leading to mining and environmental degradation. [3 marks] (b) Outline four ways of reducing energy consumption when using computers. 1. Use energy-efficient computers and monitors. 2. Enable power-saving modes such as sleep or hibernate when idle. 3. Turn off the computer and peripherals when not in use. 4. Reduce screen brightness and use dark mode where possible. [4 marks] (c) Distinguish between the concepts of abstraction and decomposition in programming. • Abstraction is the process of hiding complex details and showing only the necessary features of a program. • Decomposition is the process of breaking down a complex problem into smaller, manageable sub-problems or modules. [2 marks] (d) Describe how to group shapes in PowerPoint. 1. Select all the shapes you want to group by holding Shift and clicking each shape Join✅