A. Beam balance
B. Analytical balance
C. Spring balance
spring balance.
I think is termed: Pressure filtration.
The first one is have the refrigerant level checked by a qualified professional. The technician will be checking any possible leak, damage and conduct test on the system. Second is to ensure airflow. Change the filter regularly, usually about every three months or maybe monthly, depending on its usage. Have the coils cleaned by a professional if it is already dirty. The third method is to not use your air conditioner when the outside temperature is below 60º. You will be saving energy and money on utility costs by just opening the windows on cool days.
The term phenotype refers to the observable characteristic of an organism or an individual. This may come in terms of development, behavior, or appearance. From the choice above, the phenotype is "having freckles". Thus, the answer is letter C.
