Question

sorry this is not my handwriting
please help me please​

Answer 1

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• liquefied petroleum gas (LPG)
• alloys
• synapse
• silicon

Hope it helps....✌️✌️

Answer 2

Answer:

1. Coal and Firewood

2. Solder (alloy of lead and tin)

3. Synapse

4. Silicon

Explanation:

Hope this helps.