I believe the answer is <span>Causal or internal validity
</span><span>Causal or internal validity is a form of research method that being done in order to obtain truth about a certain cause-effect relationship.
This method is carried out by Comparing the initial cause-effect with additional Alternative cause and see whether the effect is changing.</span>
Answer:
A). So hard that it makes burrowing difficult or so soft that it could cause.
Explanation:
As per the question, the correct revision of the given phrase is displayed through 'option A' as it correctly employs the idiomatic phrase and uses 'that' correctly to indicate the results or outcomes('So hard that it makes burrowing difficult' or 'so soft that it could cause') of an action. The other options either carries parallelism error in presenting the degrees equally('hard enough' and 'soft enough as' in option B', 'so hard as' and 'so enough so' in option C) or fails to portray the comparison inappropriately(options D(no use of noun after 'as hard as' to which it compares and in option E('too hard' to what is not elaborated). Thus, <u>option A</u> is the correct answer.
Answer:
When Mendel crossed the plants he concluded that pea traits like flower color were determined by separate units. From the results, Mendel proved that all traits do not blend. For instance, purple flowers mixed with white flowers did not produce pink flowers. Mendel concluded that traits like flower color must be determined by individual units.
Explanation:
Irrigation: The Egyptians developed systems of irrigation to make the most of the Nile's water, they diverted flood waters from cities to prevent them from flowing. I<span>rrigation was crucial to their agricultural success, but regardless, there were no statewide regulations on water control. Irrigation was the responsibility of local farmers.
That's all I know I hope it helped! :) </span>
