Both inventions were done by teenagers at their times.
Both inventions claimed to help the environment: Boyan Slat's machine would clean up trash floating in ocean. Duro-Aina Adebola, Akindele Abiola, Faleke Oluwatoyin, and Bello Eniola proposed power generation from urine that would not create carbon monoxide.
Unfortunately both inventions were also challenged by more established scientists and engineers.
Answer:A is the correct answer
Explanation:The reason for that is because if you ever don't understand a word you see the surrounding words or phrases.For example,the sentence "The little girl coward in fear when she saw the spider" Lets say you didn't know what coward meant but w do know that the sentence states that she feared the spider so coward might mean to be afraid or unable to do something.
A-Progressive tense Example: I bike everyday. "I am biking today."
It is choice 2: copper, bronze, and stone
Explanation:
list of these:
Spring: 4 February–5 May.
Summer: 6 May–7 August.
Autumn: 8 August–6 November.
Winter: 7 November–3 February.