Zaiden and Lisa are testing music’s effect on plants. What should their materials list include to guarantee they have a valid experiment that includes repetition? a radio good soil for the plants at least three separate plants equal amount of water to provide the plants daily

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

welcome mark brainliest i am trying to get to the next level.

the answer to this question is d

i dont know this man

answer; can each be concretely realized in different ways;