Respuesta :
Answer: 1.millimeter 2.meter
Explanation:
a phones thickness can be measured with such a small measurement and a tree is not big enough for a megameter but not small enough for a millimeter so it'd be a meter
1) Millimeter, 2) Meter.
In this question we proceed to present the answer for each case with a succinct justification:
1) The unit of length most suitable for measuring the thickness of a cell phone is a millimeter. Justification - The millimeter is the length unit most used to measure the dimensions of cell phones accordingly with property charts from manufacturers.
2) The unit of length most suitable for measuring the height of a backyard tree is a meter. Justification - The meter is the most common length unit used to measure the dimensions of trees, especially in botanics.
We kindly invite you to check this question on length units: https://brainly.com/question/17569516