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.

1.solid

2.carbon dioxide

3.helium