How does the amount of fertilizer in a field affect the number of earthworms present? 1. Identify one controlled variable.
2. Identify the dependent variable.
3. Identify the independent variable.

Because you ate playdough

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

Iam pretty sure that the answer is d