1. A group of students sets up an investigation to test which type of soil helps a tomato plant grow the tallest. The students plant seed sprouts in three identical pots with three different types of soil. What is the experimental variable in the students’ test? (1 point) the type of soil used in each pot
the amount each plant grows
the amount of sunlight each plant receives
the size and shape of the pot

answer; /// i believe that the correct answer is (d)the huang he river valley;

china is shifting toward specialization in industry and services and away from agriculture.

explanation:

mark brainliest

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.