"An insurer must show a causal connection between a loss and an exclusion before the exclusion will limit coverage under the policy." South Carolina Ins. Guar. Ass'n v. Broach, 291 S.C. 349, 351, 353 S.E.2d 450, 451 (1987). In McPherson v. Michigan Mutual Insurance Co., 310 S.C. 316, 320, 426 S.E.2d 770, 771 (1993), our supreme court held that "for the purpose of construing an exclusionary clause in a general liability policy, 'arising out of' should be narrowly construed as 'caused by.'" Furthermore, "where the words of a policy are capable of two reasonable interpretations, that construction will be adopted which is most favorable to the insured." Id. "A suit for declaratory judgment is neither legal nor equitable, but is determined by the nature of the underlying issue." Felts v. Richland County, 303 S.C. 354, 356, 400 S.E.2d 781, 782 (1991). A suit to determine coverage under an insurance policy is an action at law. Therefore, this Court's jurisdiction "is limited to correcting errors of law and factual findings will not be disturbed unless unsupported by any evidence." State Farm Mut. Auto. Ins. Co. v. James, 337 S.C. 86, 93, 522 S.E.2d 345, 348-49 (Ct. App. 1999); see also Townes Assocs. v. City of Greenville, 266 S.C. 81, 221 S.E.2d 773 (1976).