D because gravitational force cannot pull or push
Answer:
When cells work together to perform a specific function, that group of cells is called a tissue. Cartilage is a type of connective tissue made from many cells. Other types of tissues in your body include your muscles and skin. Complex multicell organisms have many different types of tissues, all comprising two or more types of cells.
Answer:D
Explanation:
The passage talks about how it's gravity disrupts the path of light
(15) Label 1 is D
(16) Label 2 is A
(17) Label 3 is B
(18) Label 4 is C
I think the answer would be B
sorry if not