Question

1) Substance that burns in air to produce heat and light are called _________ substance.


2) NGO stands for _________.


3) A machine called _________ is used for both harvesting and threshing.


4) _________ is a unicellular algae.


5) _________ is the disease caused by eating foodstuffs that can cause illnes
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Answer 1

3: theser
4: cholerella and spirulina
5: food poisoning