What part of the scientific method involves constructing a tentative and testable explanation based on observations and research?

Hypothesis

Explanation:

A hypothesis is often described as a scientific guess.

Scientific method is a series of systematic approach developed to carry out scientific investigations.

These methods are:

Observation Hypothesis Theory Law

A hypothesis is a scientific explanation to an observation. It provides a platform for carrying out experiments to test ideas and to see how repeatable an observation can be.

Options:

A. Analyzing data

B.  Conducting background research

C. Constructing a hypothesis  

 D. Designing an experiment

The answer to this question is option C "Constructing a hypothesis." A hypothesis is a statement that basically says what you will be testing it's a educated guess on what you think what will happen in a experiment for example out of three brands of popcorn I think the butter popcorn will leave the most amount of kernels.

Hope this helps.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.