Answer: 30 years
Explanation: what is 30 plus 30... 60 it says he died in 1930 and discoverd the thing in 1960 add 30 boom its been 30 years
Answer:
weird pictures to answer but rubber trees do nothing for an environment so they would be at the bottom then flees which are eaten by aphid insects which are eaten by birds at the top of the chain
I think you might've forgotten something. There is no labels, pictures, or any options. Add some more stuff and I'd be able to help out.
Answer:
d
Explanation:
others can offered and get it
