I would have to say A. A plant wants its seeds to be spread out so more plants can grow. Getting stuck to animal fur helps that, unlike C. If the animal ate the seed, that would be no help to the plant that wants its seeds to grow. That eliminates C + D. B would work, but your question asks about animals, not insects. So, A is the only plausible answer. Hope this helps!
Answer:
I think it is a pure substance, not 100% though.
A: glans penis- sex organ
B: scrotum- keeps testis at a lower temperature
C: testicles(testis)- produces sperm and testosterone
D: seminal vesicle/ ejaculatory duct- produces seminal fluid which feeds the sperm and allows them to swim.
The Calvin cycle is known as the light independent reaction though it is not directly dependent on the light but the requirement of energy carriers ( ATP and NADPH) which is essential for initiation of Calvin cycle is dependent on light.