What is demonstrated by water moving up a straw?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Could someone me with number one you

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables