Question

12) Some nitrogen fixing bacteria help increase fertility. This makes the soil more
productive. What activity of bacteria helps make soil more productive?
(a) Supplying compounds of nitrogen to the plant roots.
(b) Breaking down nitrogen rich waste into nitrogen gas.
(c) Breaking down compounds of nitrogen to release nitrogen gas.
(d) Taking up nitrogen from the air and converting it into compounds of nitrogen.​

Answer 1

Answer:

I think d is the right answer

Answer 2

nitrogen fixing bacteria fixed nitrogen from air to soil means it produce the compounds of nitrogen

and mixed it with soil .so soil is thus made more productive by nitrogen fixing bacteria.

d) Taking up nitrogen from the air and converting it into compounds of nitrogen.