Answer:
B. Infinitive phrase is the answer
D, Recycling helps in conservation of natural environmental resources
The answer is personification.
D. by rehearsing, you will rob your presentation of its vitality
It's A. The boy accepts free food of charge from the cafe.
sorry i know its 1 year later since this question was up but i didn't see any answer so I just put it here. Its correct trust me.