I'm 100% that the answer is D, thermal conductivity.
It was either C or D but D makes more sense than C does
so your answer is D
Plants roots display positive gravitropism which means they grow in the direction of gravity
The answer would be A- Wind.
The answer is Chordates
Chordates belong to the pylum Chordata of the Animal Kingdom.They have the following characteristics;
Lower vertebrates have a notochord which is a hollow nerve chord that is located dorsally of the animal while higher vertebrates have a vertebral column of bone and cartilage. They have a coelom which is a body cavity that differentiates higher vertebrates into organs and digestive tract.
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