A and C
They both can be compared to present or past objects to show how they have changed or evolved over time
Answer: 3. gravitropism
The movement of plants in response to stimuli is called as tropism. Plants respond to different stimuli like light (phototropism), water present in the soil (hydrotropism), gravity (gravitropism) and touch (thigmotropism).
Gravitropism refers the growth and movement of plant parts with respect to the force of gravity exerted by earth. The roots shows positive gravitational tropism because they are growing towards earth gravity. The shoots or stems shows negative gravitational tropism because they are moving or growing against the gravity.
It belongs to 100-999 SCI Code. So its Primary category. Because its all about the farm and geographical industry that focuses on land production, deformation and production in growing the status of our economy and provide the need of people.
The answer would be C. It cant be A because thats the small intestant job not the large intestant. It cant be B because thats the pancreas job. And it cant be D because thats DNA job. So its just C. Hope this helped